mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
#include<stdio.h>
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#include<string.h>
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#include<iostream>
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#include<queue>
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using namespace std;
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const int maxn = 1005;
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const int inf = 1<<29;
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struct nd{
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int x,y,d,t,id;
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};
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int has[maxn][maxn][4];
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int ans[maxn][maxn][4];
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int vis[maxn][maxn][4];
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int dx[] = {0,-1,0,1};
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int dy[] = {1,0,-1,0};
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char as[maxn][maxn],E[10],dd[128];
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int N,M,m,mn,cnt;
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int si,sj,di,dj;
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bool nok(int x,int y){
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if(x<0||y<0||x==N||y==M||as[x][y]=='*')return true;
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return false;
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}
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void bfs(int x,int y,int d)
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{
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nd k,t;
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int a,b,c,i;
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cnt = 0;
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for(a = 0; a < N; ++ a)
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for(b = 0; b < M; ++ b)
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for(c = 0; c < 4; ++ c)
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has[a][b][c]=inf,ans[a][b][c]=0;
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has[x][y][d]=0; ans[x][y][d]=1;
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if(x==di&&y==dj)return;
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queue<nd>que;
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t.x=x;t.y=y;t.d=d;t.t=0; t.id = cnt; vis[x][y][d]=cnt++;
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que.push(t);
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while(!que.empty()){
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t = que.front(); que.pop();
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if(t.id ^ vis[t.x][t.y][t.d])continue;
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for(i = 0; i < 4; ++ i){
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k = t; k.t++; k.d = i;
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k.x += dx[i]; k.y += dy[i];
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if(nok(k.x,k.y))continue;
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if(i^t.d)k.t++;
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if((i+2)%4==t.d)k.t++;
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if(k.t>has[k.x][k.y][k.d]||k.t>mn)continue;
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if(k.t==has[k.x][k.y][k.d]){
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ans[k.x][k.y][k.d] += ans[t.x][t.y][t.d];
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if(ans[k.x][k.y][k.d]>=m)ans[k.x][k.y][k.d]-=m;
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if((i+2)%4==t.d){
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ans[k.x][k.y][k.d] += ans[t.x][t.y][t.d];
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if(ans[k.x][k.y][k.d]>=m)ans[k.x][k.y][k.d]-=m;
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}
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}else{
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ans[k.x][k.y][k.d]=ans[t.x][t.y][t.d];
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if((i+2)%4==t.d)ans[k.x][k.y][k.d] += ans[t.x][t.y][t.d];
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if(ans[k.x][k.y][k.d]>=m)ans[k.x][k.y][k.d]-=m;
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}
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has[k.x][k.y][k.d] = k.t;
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if(k.x==di && k.y==dj){
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if(has[k.x][k.y][k.d]<mn)mn=has[k.x][k.y][k.d];
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continue;
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}
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k.id = cnt; vis[k.x][k.y][k.d] = cnt++;
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que.push(k);
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}
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ans[t.x][t.y][t.d]=0;
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}
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}
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int main()
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{
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int cas=0,i,k;
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dd['E']=0;dd['N']=1;dd['W']=2;dd['S']=3;
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while(scanf("%d %d %d",&N,&M,&m)!=EOF){
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if(!m)break;
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for(i = 0; i < N; ++ i)
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scanf("%s",as[i]);
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scanf("%d %d %d %d %s",&si,&sj,&di,&dj,E);
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mn = inf;
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bfs(si,sj,dd[E[0]]);
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k = 0;
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for(i = 0; i < 4; ++ i){
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if(has[di][dj][i]<mn){
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mn = has[di][dj][i];
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k = ans[di][dj][i];
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}else if(has[di][dj][i]==mn){
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k += ans[di][dj][i];
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if(k >= m)k -= m;
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}
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}
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if(mn==inf)printf("Case %d: %d -1\n",++cas,m);
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else printf("Case %d: %d %d\n",++cas,m,k);
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}
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return 0;
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}
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