#include<cstdio> #include<cstring> #include<algorithm> using namespace std; const int MAXN = 210; const int INF = 1e8; int dis[MAXN][MAXN],t[MAXN]; int n,m,k; int main() { scanf("%d%d",&n,&m); for (int i=0; i<n; ++i) //坐标都是从0开始 for (int j=0; j<n; ++j) dis[i][j] = INF; for (int i=0; i<n; ++i) scanf("%d",&t[i]); //这个是有序的 for (int u,v,w,i=1; i<=m; ++i) { scanf("%d%d%d",&u,&v,&w); dis[u][v] = w; dis[v][u] = w; } t[n] = INF; //当k到达n时,可以跳出循环 int q,k = 0,u,v,w; scanf("%d",&q); while (q--) { scanf("%d%d%d",&u,&v,&w); while (t[k]<=w) //是t[k]不是k,k表示当前是第几个点修建完成 { for (int i=0; i<n; ++i) //Floyd for (int j=0; j<n; ++j) if (dis[i][k]!=INF&&dis[k][j]!=INF) dis[i][j] = min(dis[i][k]+dis[k][j],dis[i][j]); k++; } if (t[u]>w||t[v]>w||dis[u][v]==INF) printf("-1\n");//判断u,v点在w时间是否修建完成,完成是否能到达 else printf("%d\n",dis[u][v]); } return 0; }
时间: 2024-11-05 23:09:54