結果

問題 No.659 徘徊迷路
コンテスト
ユーザー tails
提出日時 2018-03-02 23:40:54
言語 C
(gcc 13.3.0)
結果
AC  
実行時間 49 ms / 2,000 ms
コード長 1,336 bytes
コンパイル時間 1,160 ms
コンパイル使用メモリ 32,768 KB
実行使用メモリ 6,944 KB
最終ジャッジ日時 2024-06-22 13:44:57
合計ジャッジ時間 1,673 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge5
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 5
other AC * 12
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.c:1:1: warning: data definition has no type or storage class
    1 | r;c;long long t;
      | ^
main.c:1:1: warning: type defaults to 'int' in declaration of 'r' [-Wimplicit-int]
main.c:1:3: warning: data definition has no type or storage class
    1 | r;c;long long t;
      |   ^
main.c:1:3: warning: type defaults to 'int' in declaration of 'c' [-Wimplicit-int]
main.c:2:1: warning: data definition has no type or storage class
    2 | sy;sx;
      | ^~
main.c:2:1: warning: type defaults to 'int' in declaration of 'sy' [-Wimplicit-int]
main.c:2:4: warning: data definition has no type or storage class
    2 | sy;sx;
      |    ^~
main.c:2:4: warning: type defaults to 'int' in declaration of 'sx' [-Wimplicit-int]
main.c:3:1: warning: data definition has no type or storage class
    3 | gy;gx;
      | ^~
main.c:3:1: warning: type defaults to 'int' in declaration of 'gy' [-Wimplicit-int]
main.c:3:4: warning: data definition has no type or storage class
    3 | gy;gx;
      |    ^~
main.c:3:4: warning: type defaults to 'int' in declaration of 'gx' [-Wimplicit-int]
main.c:8:1: warning: data definition has no type or storage class
    8 | y;x;v;u;j;i;
      | ^
main.c:8:1: warning: type defaults to 'int' in declaration of 'y' [-Wimplicit-int]
main.c:8:3: warning: data definition has no type or storage class
    8 | y;x;v;u;j;i;
      |   ^
main.c:8:3: warning: type defaults to 'int' in declaration of 'x' [-Wimplicit-int]
main.c:8:5: warning: data definition has no type or storage class
    8 | y;x;v;u;j;i;
      |     ^
main.c:8:5: warning: type defaults to 'int' in declaration of 'v' [-Wimplicit-int]
main.c:8:7: warning: data definition has no type or storage class
    8 | y;x;v;u;j;i;
      |       ^
main.c:8:7: warning: type defaults to 'int' in declaration of 'u' [-Wimplicit-int]
main.c:8:9: warning: data definition has no type or storage class
    8 | y;x;v;u;j;i;
      |         ^
main.c:8:9: warning: type defaults to 'int' in declaration of 'j' [-Wimplicit-int]

ソースコード

diff # 

r;c;long long t;
sy;sx;
gy;gx;
char b[12][12];
double m[12][12][12][12];
double n[12][12][12][12];
double e[12][12][12][12];
y;x;v;u;j;i;

f(long long l){
	if(l>1){
		f(l>>1);
		memcpy(n,m,sizeof m);
		for(y=0;y<r;++y){
			for(x=0;x<c;++x){
				for(v=0;v<r;++v){
					for(u=0;u<c;++u){
						m[y][x][v][u]=0;
						for(j=0;j<r;++j){
							for(i=0;i<c;++i){
								m[y][x][v][u]+=n[y][x][j][i]*n[j][i][v][u];
							}
						}
					}
				}
			}
		}
	}
	if(l&1){
		memcpy(n,m,sizeof m);
		for(y=0;y<r;++y){
			for(x=0;x<c;++x){
				for(v=0;v<r;++v){
					for(u=0;u<c;++u){
						m[y][x][v][u]=0;
						for(j=0;j<r;++j){
							for(i=0;i<c;++i){
								m[y][x][v][u]+=n[y][x][j][i]*e[j][i][v][u];
							}
						}
					}
				}
			}
		}
	}
}

main(){
	scanf("%d%d%lld ",&r,&c,&t);
	scanf("%d%d ",&sy,&sx);
	scanf("%d%d ",&gy,&gx);
	for(y=0;y<r;++y){
		gets(b[y]);
	}

	for(y=1;y<r-1;++y){
		for(x=1;x<c-1;++x){
			int k=0;
			if(b[y-1][x]=='.') ++k;
			if(b[y+1][x]=='.') ++k;
			if(b[y][x-1]=='.') ++k;
			if(b[y][x+1]=='.') ++k;
			if(k){
				double p=1./k;
				if(b[y-1][x]=='.') e[y][x][y-1][x]=p;
				if(b[y+1][x]=='.') e[y][x][y+1][x]=p;
				if(b[y][x-1]=='.') e[y][x][y][x-1]=p;
				if(b[y][x+1]=='.') e[y][x][y][x+1]=p;
			}else{
				e[y][x][y][x]=1;
			}
			m[y][x][y][x]=1;
		}
	}

	f(t);
	printf("%.9f\n",m[sy][sx][gy][gx]);
}
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