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总是超时,没办法了,大牛帮忙给看看: 谢谢谢谢!!!#include <iostream> #include <fstream> using namespace std; #define Max 1000 int g[Max][Max]; //邻接表 int dest[Max]; //记录去除这一点以后它的最大权值 int mark[Max]; int n; int dfs(int p,int exp){ mark[p]=1; int depth=1; for(int i=1;i<=n;i++){ if(g[p][i]==1&&mark[i]==0&&i!=exp&&i!=p){ mark[i]=1; depth+=dfs(i,exp); } } return depth; } void main(){ // ifstream cin("data.txt"); cin>>n; memset(dest,0,sizeof(dest)); memset(g,0,sizeof(g)); memset(mark,0,sizeof(mark)); for(int i=1;i<n;i++){ int x,y; cin>>x>>y; g[x][y]=g[y][x]=1; } for(i=1;i<=n;i++){ //去除这一点 for(int j=1;j<=n;j++){ for(int k=1;k<=n;k++){ mark[k]=0; } mark[i]=1; if(j!=i&&g[i][j]==1){ int tmp=dfs(j,i); if(tmp>dest[i])dest[i]=tmp; } } // cout<<dest[i]<<endl; } for(i=1;i<=n;i++){ if(dest[i]<=n/2)cout<<i<<endl; } } Followed by:
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