mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
316 lines
7.8 KiB
C++
316 lines
7.8 KiB
C++
#include <iostream>
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#include <cstdio>
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#include <cstdlib>
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#include <cmath>
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#include <queue>
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#include <algorithm>
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#include <vector>
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#include <cstring>
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#include <stack>
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#include <cctype>
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#include <utility>
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#include <map>
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#include <string>
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#include <climits>
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#include <set>
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#include <string>
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#include <sstream>
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#include <utility>
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#include <ctime>
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using std::priority_queue;
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using std::vector;
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using std::swap;
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using std::stack;
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using std::sort;
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using std::max;
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using std::min;
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using std::pair;
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using std::map;
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using std::string;
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using std::cin;
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using std::cout;
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using std::set;
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using std::queue;
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using std::string;
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using std::stringstream;
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using std::make_pair;
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using std::getline;
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using std::greater;
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using std::endl;
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using std::multimap;
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using std::deque;
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using std::random_shuffle;
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typedef long long LL;
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typedef unsigned long long ULL;
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typedef pair<int, int> PAIR;
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typedef multimap<int, int> MMAP;
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typedef LL TY;
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const int MAXN(10010);
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const int MAXM(5010);
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const int MAXE(10010);
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const int MAXK(6);
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const int HSIZE(13131);
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const int SIGMA_SIZE(26);
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const int MAXH(19);
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const int INFI((INT_MAX-1) >> 1);
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const ULL BASE(31);
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const LL LIM(10000000);
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const int INV(-10000);
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const int MOD(65521);
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template<typename T> void checkmax(T &a, T b){if(b > a) a = b;}
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template<typename T> void checkmin(T &a, T b){if(b < a) a = b;}
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template<typename T> T ABS(const T &a){return a < 0? -a: a;}
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int pre[21][10][MAXN], opt[21][10][MAXN];
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int MM;
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struct HASH_MAP
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{
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int first[HSIZE], value[MAXN], next[MAXN];
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LL state[MAXN];
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int size;
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void init()
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{
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memset(first, -1, sizeof(first));
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size = 0;
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}
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void insert(LL ts, int tv, int x, int y, int pid, int op)
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{
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int h = ts%HSIZE;
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for(int i = first[h]; ~i; i = next[i])
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if(state[i] == ts)
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{
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if(tv > value[i])
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{
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pre[x][y][i] = pid;
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opt[x][y][i] = op;
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value[i] = tv;
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}
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return ;
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}
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checkmax(MM, size);
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pre[x][y][size] = pid;
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opt[x][y][size] = op;
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state[size] = ts;
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value[size] = tv;
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next[size] = first[h];
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first[h] = size++;
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}
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} hm[2];
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HASH_MAP *cur, *last;
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int N, M;
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int code[11], path[11];
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int Num[8];
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char mp[21][15];
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void decode(LL ts)
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{
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for(int i = 0; i <= M; ++i)
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{
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code[i] = ts&7;
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path[i] = ts&8;
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ts >>= 4;
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}
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}
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LL encode()
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{
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LL ret = 0;
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memset(Num, -1, sizeof(Num));
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int cnt = 0;
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for(int i = M; i >= 0; --i)
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if(code[i] == 0)
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ret = (ret << 4)|path[i];
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else
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{
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if(Num[code[i]] == -1) Num[code[i]] = ++cnt;
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ret = (ret << 4)|Num[code[i]]|path[i];
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}
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return ret;
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}
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void updata(int x, int y, int tv, int pid)
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{
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int lc = (y == 0)? 0: code[y];
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int uc = (x == 0)? 0: code[y+1];
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int lp = (y == 0)? 0: path[y-1];
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int up = (x == 0)? 0: path[y+1];
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if(mp[x][y] == 'S' || mp[x][y] == 'T')
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{
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if(lc == 0 && uc == 0)
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{
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if(lp || up) return;
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if(x < N-1)
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{
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path[y] = 8;
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code[y] = 7;
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code[y+1] = 0;
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cur->insert(encode(), tv+1, x, y, pid, 1);
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}
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if(y < M-1)
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{
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path[y] = 8;
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code[y] = 0;
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code[y+1] = 7;
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cur->insert(encode(), tv+1, x, y, pid, 1);
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}
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}
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else
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if(lc == 0 || uc == 0)
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{
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if(lc)
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{
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if(up) return;
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path[y] = 8;
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code[y] = code[y+1] = 0;
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cur->insert(encode(), tv+1, x, y, pid, 1);
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}
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else
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{
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if(lp) return;
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path[y] = 8;
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code[y] = code[y+1] = 0;
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cur->insert(encode(), tv+1, x, y, pid, 1);
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}
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}
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return;
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}
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if(mp[x][y] == 'B')
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{
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if(lc == 0 && uc == 0)
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{
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path[y] = 0;
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code[y] = code[y+1] = 0;
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cur->insert(encode(), tv, x, y, pid, 0);
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}
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return;
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}
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if(lc == 0 && uc == 0)
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{
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path[y] = 0;
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code[y] = code[y+1] = 0;
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cur->insert(encode(), tv, x, y, pid, 0);
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if(x == N-1 || y == M-1) return;
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if(lp || up) return;
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path[y] = 8;
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code[y] = code[y+1] = 7;
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cur->insert(encode(), tv+1, x, y, pid, 1);
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}
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else
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if(lc == 0 || uc == 0)
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{
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if(lc)
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{
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if(up) return;
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if(x < N-1)
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{
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path[y] = 8;
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code[y] = lc;
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code[y+1] = 0;
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cur->insert(encode(), tv+1, x, y, pid, 1);
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}
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if(y < M-1)
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{
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path[y] = 8;
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code[y] = 0;
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code[y+1] = lc;
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cur->insert(encode(), tv+1, x, y, pid, 1);
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}
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}
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else
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{
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if(lp) return;
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if(x < N-1)
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{
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path[y] = 8;
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code[y] = uc;
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code[y+1] = 0;
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cur->insert(encode(), tv+1, x, y, pid, 1);
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}
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if(y < M-1)
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{
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path[y] = 8;
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code[y] = 0;
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code[y+1] = uc;
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cur->insert(encode(), tv+1, x, y, pid, 1);
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}
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}
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}
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else
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if(lc != uc)
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{
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path[y] = 8;
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for(int i = 0; i <= M; ++i)
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if(code[i] == uc) code[i] = lc;
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code[y] = code[y+1] = 0;
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cur->insert(encode(), tv+1, x, y, pid, 1);
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}
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}
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void solve()
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{
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cur = hm;
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last = hm+1;
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last->init();
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last->insert(0, 0, 0, 0, 0, 0);
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for(int i = 0; i < N; ++i)
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{
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int sz = last->size;
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for(int j = 0; j < sz; ++j)
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last->state[j] <<= 4;
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for(int j = 0; j < M; ++j)
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{
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cur->init();
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sz = last->size;
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for(int k = 0; k < sz; ++k)
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{
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decode(last->state[k]);
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updata(i, j, last->value[k], k);
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}
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swap(cur, last);
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}
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}
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int ans = 0, id;
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for(int i = 0; i < last->size; ++i)
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{
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decode(last->state[i]);
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bool flag(true);
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for(int j = 0; j <= M; ++j)
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if(code[j])
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{
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flag = false;
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break;
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}
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if(flag)
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{
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if(last->value[i] > ans)
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{
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ans = last->value[i];
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id = i;
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}
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}
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}
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for(int i = 0; i < N; ++i)
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for(int j = 0; j < M; ++j)
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if(mp[i][j] == '.')
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mp[i][j] = 'W';
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for(int i = N-1; i >= 0; --i)
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for(int j = M-1; j >= 0; --j)
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{
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if(mp[i][j] == 'W' && opt[i][j][id]) mp[i][j] = '.';
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id = pre[i][j][id];
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}
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printf("%d\n", ans);
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for(int i = 0; i < N; ++i)
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printf("%s\n", mp[i]);
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printf("\n");
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}
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int main()
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{
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int TC, n_case(0);
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scanf("%d", &TC);
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while(TC--)
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{
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scanf("%d%d", &N, &M);
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for(int i = 0; i < N; ++i)
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scanf("%s", mp[i]);
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printf("Case %d: ", ++n_case);
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solve();
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}
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return 0;
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}
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