mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
37 lines
902 B
C++
37 lines
902 B
C++
#include <iostream>
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#include <cstdio>
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#include <cstring>
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#include <queue>
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using namespace std;
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const int N=22, M=1000;
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int map[N][N],dp[N][N];
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int main()
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{
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int i,r,j,n,m,k,s,t,T;
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while(scanf("%d%d",&n,&m) && n+m)
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{
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memset(map,0,sizeof(map));
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for(i=0;i<m;i++){
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scanf("%d%d",&s,&t);
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map[s+1][t+1]=1;
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}
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scanf("%d",&T);
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while( T-- )
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{
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memset(dp,0,sizeof(dp));
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scanf("%d%d%d",&s,&t,&k);
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s++; t++;
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dp[0][s]=1;
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for(i=1;i<=k;i++)
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for(r=1;r<=n;r++)
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for(j=1;j<=n;j++)
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if( map[r][j] ){
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dp[i][j]+=dp[i-1][r];
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dp[i][j]%=M;
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}
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printf("%d\n",dp[k][t]);
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}
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}
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return 0;
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}
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