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| #include<stdio.h>
#include<cstring>
#include<algorithm>
#include<iostream>
#define mem(x,y) memset(x,y,sizeof(x))
#define inf 0x3f3f3f3f
using namespace std;
#define siz 20
#define Mytype long long
int N;
Mytype mod = 1000;
struct matrix
{
Mytype a[siz][siz];
matrix operator*(const matrix &y)const
{
matrix res;
mem(res.a,0);
for(int i=0;i<N;i++)
for(int j=0;j<N;j++)
if(a[i][j])
for(int k=0;k<N;k++)
res.a[i][k]+=a[i][j]*y.a[j][k],res.a[i][k]%=mod;
return res;
}
matrix operator+(const matrix &y)const
{
matrix res;
for(int i=0;i<N;i++)
for(int j=0;j<N;j++)
res.a[i][j]=a[i][j]+y.a[i][j],res.a[i][j]%=mod;
return res;
}
matrix operator*=(const matrix &y)
{
*this=y* *this;
return *this;
}
};
matrix qmod(matrix a,int k)
{
matrix res;
mem(res.a,0);
for(int i=0;i<N;i++)
res.a[i][i]=1;
while(k)
{
if(k&1)
res*=a;
a*=a;
k>>=1;
}
return res;
}
int main()
{
int m;
while(scanf("%d%d",&N,&m),N+m)
{
matrix a;
mem(a.a,0);
while(m--)
{
int u,v;
scanf("%d%d",&u,&v);
a.a[u][v]=1;
}
int t;
scanf("%d",&t);
while(t--)
{
int x,y,k;
scanf("%d%d%d",&x,&y,&k);
matrix t=qmod(a,k);
printf("%d\n",t.a[x][y]);
}
}
}
|