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xiaoxiao2021-02-28  101

#include<cstdio> #include<iostream> #include<algorithm> using namespace std; int n,m; int t; struct node { int from; int to; int dis; int next; }e[1000]; int head[1000]; int add(int from,int to,int dis) { t++; e[t].from=from; e[t].next=head[from]; e[t].to=to; e[t].dis=dis; head[from]=t; } int main() { cin >> n >> m; for (int i=1;i<=m;i++) { int x,y,z; scanf("%d%d%d",&x,&y,&z); add(x,y,z); add(y,x,z); } for (int i=1;i<=n;i++) if (head[i]!=0) { printf("%d:",i); for (int j=head[i];j!=0;j=e[j].next) printf("%d ",e[j].to); printf("\n"); } return 0; }
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