Submission #1229752

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Source Code Expand

#include<bits/stdc++.h>
#define rep(i,k,n) for(int i=k;i<=n;i++)
#define rep2(i,k,n) for(int i=k;i>=n;i--)
#define pb push_back
using namespace std;
const int N=3005;
vector<int> tu[N];
int n,a[N],vis[N];
int main(){
	scanf("%d",&n);
	rep(i,1,n)scanf("%d",&a[i]);
	rep(i,1,n-1){
		int x,y;
		scanf("%d%d",&x,&y);
		tu[x].pb(y),tu[y].pb(x);
	}
	int lim=n;
	while(lim--){
		rep(i,1,n)if(!vis[i]){
			int op=1;
			for(int j=0;j<tu[i].size();j++){
				int v=tu[i][j];
				if(vis[v]!=1 && a[v] < a[i]){
					op=0;break;
				}
			}
			if(op)vis[i]=2;
		}
		rep(i,1,n)if(vis[i]==2){
			for(int j=0;j<tu[i].size();j++){
				int v=tu[i][j];
				if(!vis[v]){
					vis[v]=1;
				}
			}
		}
	}
	rep(i,1,n)if(vis[i]==1)printf("%d ",i);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:10:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
./Main.cpp:11:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  rep(i,1,n)scanf("%d",&a[i]);
                             ^
./Main.cpp:14:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&x,&y);
                      ^

Judge Result