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为何RE!!!!!!!!!!!!!#include<cstdio> #include<iostream> #include<cstring> #include<algorithm> using namespace std; struct node{ int u,v,w,next; }a[10001]={0}; int tot=0; int last[101]={0}; void add(int x,int y,int z){ tot++; a[tot].u=x; a[tot].v=y; a[tot].w=z; a[tot].next=last[x]; last[x]=tot; } int fa[101]={0}; bool cmp(const node &a,const node &b){ return a.w<b.w; } int find(int x){ if(!fa[x]) return x; else return fa[x]=find(fa[x]); } void unio(int x,int y){ fa[find(x)]=find(y); } int main(){ int q=0; int res[1001]={0}; int x,y; int m=0; int n; while(scanf("%d",&n)!=EOF){ int i,j,k; memset(a,0,sizeof(a)); memset(fa,0,sizeof(fa)); tot=0; memset(last,0,sizeof(last)); for(i=1;i<=n;i++) for(j=1;j<=n;j++){ scanf("%d",&x); if(x&&j<=i){ m++; add(i,j,x); }} int ans=0; sort(a+1,a+m+1,cmp); k=0; for(i=1;i<=m;i++){ if(k==n-1) break; if(find(a[i].u)!=find(a[i].v)){ unio(a[i].u,a[i].v); ans+=a[i].w; } } res[q++]=ans; } for(int i=0;i<q;i++) printf("%d\n",res[i]); return 0; } /*4 0 4 9 21 4 0 8 17 9 8 0 16 21 17 16 0 4 0 4 9 21 4 0 8 17 9 8 0 16 21 17 16 0*/ Followed by:
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