OJ-Problems-Source/HDOJ/1662_autoAC.cpp

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#include<cstring>
#include<cassert>
#include<cstdio>
#include<cctype>
#include<ctime>
#include<cmath>
#include<functional>
#include<algorithm>
#include<iostream>
#include<vector>
#include<string>
#include<bitset>
#include<queue>
#include<deque>
#include<stack>
#include<list>
#include<map>
#include<set>
using namespace std;
typedef long long int64;
typedef unsigned long long uint64;
typedef pair <int, int> PII;
typedef pair <int64, int64> PLL;
typedef pair <char, char> PCC;
typedef pair <double, double> PDD;
#define MP make_pair
#define PB push_back
#define SZ(a) ((int)(a).size())
#define X first
#define Y second
#define L(x) ((x)<<1)
#define R(x) ((x)<<1 | 1)
#define max3(x, y, z) (max(max((x), (y)), (z)))
#define min3(x, y, z) (min(min((x), (y)), (z)))
#define BIT(x, i) (((x) >> (i)) & 1)
#define FOR(it, c) for( TYPE((c).begin()) it = (c).begin(); it != (c).end(); it++)
const double PI = 2.0*acos(0.0);
const double EPS = 1e-6;
#define GREATER(x, y) ((x) > (y) + EPS)
#define GREATER_EQUAL(x, y) ((x) > (y) - EPS)
#define LESS(x, y) ((x) < (y) - EPS)
#define LESS_EQUAL(x, y) ((x) < (y) + EPS)
#define EQUAL(x, y) (abs((x) - (y)) < EPS)
#define MAX_N 35
#define MAX_M 1005
#define MAXX 0x3f
#define UPPER 2147483647LL
#define INT_MAX 2147483647
#define INF (1<<29)
#define BINF (1LL<<60)
#define NONE -1
#define NIL 0
struct data{
char alpha;
char dir;
data(){}
data(char alpha, char dir) :alpha(alpha), dir(dir){}
} tile[MAX_N][MAX_N];
const int OFFR[] = { 1, 0, -1, 0 };
const int OFFC[] = { 0, 1, 0, -1 };
int n, m;
bool try_to_remove(int sx, int sy, int line_cnt){
bool visit[2][MAX_N][MAX_N];
memset(visit, false, sizeof(visit));
visit[0][sx][sy] = true;
int p = 0;
for (int ln = 1; ln <= line_cnt; ln++){
vector <PII> V;
memset(visit[p ^ 1], false, sizeof(visit[p ^ 1]));
for (int r = 0; r <= n + 1; r++) for (int c = 0; c <= m + 1; c++) if (visit[p][r][c]){
visit[p ^ 1][r][c] = true;
for (int k = 0; k < 4; k++){
int xx = r + OFFR[k];
int yy = c + OFFC[k];
while (xx >= 0 && xx <= n + 1 && yy >= 0 && yy <= m + 1){
if (tile[xx][yy].alpha != '.'){
if (xx == sx && yy == sy)
break;
if (tile[xx][yy].alpha == tile[sx][sy].alpha)
V.PB(MP(xx, yy));
break;
}
else
visit[p ^ 1][xx][yy] = true;
xx += OFFR[k];
yy += OFFC[k];
}
}
}
sort(V.begin(), V.end());
if (SZ(V) > 0){
tile[sx][sy].alpha = tile[V[0].X][V[0].Y].alpha = '.';
return true;
}
p ^= 1;
}
return false;
}
bool refresh(){
data tmp[MAX_N][MAX_N];
for (int r = 1; r <= n; r++) for (int c = 1; c <= m; c++)
tmp[r][c] = tile[r][c];
bool rsh = false;
for (int r = 1; r <= n; r++) for (int c = 1; c <= m; c++) if (tile[r][c].alpha != '.'){
int ver = 4;
switch (tile[r][c].dir){
case 'D': ver = 0; break;
case 'R': ver = 1; break;
case 'U': ver = 2; break;
case 'L': ver = 3; break;
}
if (ver <= 3){
int pr = r, pc = c;
int nr = pr + OFFR[ver];
int nc = pc + OFFC[ver];
if (nr >= 1 && nr <= n && nc >= 1 && nc <= m && tmp[nr][nc].alpha == '.'){
swap(tmp[pr][pc], tmp[nr][nc]);
rsh = true;
}
}
}
for (int r = 1; r <= n; r++) for (int c = 1; c <= m; c++)
tile[r][c] = tmp[r][c];
return rsh;
}
void solve(){
while (true){
bool move = false;
for (int ln = 1; ln <= 3 && !move; ln++){
for (int r = 1; r <= n && !move; r++) for (int c = 1; c <= m && !move; c++){
if (tile[r][c].alpha != '.' && try_to_remove(r, c, ln))
move = true;
}
}
if (move)
while (refresh());
else
break;
}
}
int main(){
int T = 0;
while (~scanf("%d %d", &n, &m) && n + m){
char tmp[5];
for (int r = 0; r <= n+1; r++){
for (int c = 0; c <= m+1; c++){
if (r == 0 || r == n + 1 || c == 0 || c == m + 1)
tile[r][c] = data('.', 'S');
else{
scanf("%s", tmp);
tile[r][c] = data(tmp[0], tmp[1]);
}
}
}
solve();
printf("Case %d\n", ++T);
for (int r = 1; r <= n; r++){
for (int c = 1; c <= m; c++)
putchar(tile[r][c].alpha);
puts("");
}
}
return 0;
}