Submission #1689741

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Source Code Expand

#include<bits/stdc++.h>
#define N 100005
using namespace std;
struct edge{
	int t,next;
}e[N*2];int ecnt,head[N];
void addedge(int f,int t){
	e[++ecnt]=(edge){t,head[f]};head[f]=ecnt;
	e[++ecnt]=(edge){f,head[t]};head[t]=ecnt;
}
int n,k,val[N];
priority_queue<pair<int,int> > pq;//ʵ¼ÊÉÏʹÓöÓÁо͹»ÁË 
int main(){
	scanf("%d",&n);
	for(int i=1,f,t;i<n;i++)
		scanf("%d%d",&f,&t),addedge(f,t);
	scanf("%d",&k);
	for(int i=1,v,p;i<=k;i++){
		scanf("%d%d",&v,&p);
		val[v]=p;
		pq.push(make_pair(p,v));
	}
	bool flag=true;
	while(!pq.empty()){
		int u=pq.top().second;pq.pop();
		for(int i=head[u];i;i=e[i].next){
			if(val[e[i].t]==0){
				val[e[i].t]=val[u]-1;
				pq.push(make_pair(val[u]-1,e[i].t));
			}else if(abs(val[e[i].t]-val[u])!=1) flag=false;
		}
	}
	if(!flag) puts("No");
	else{
		puts("Yes");
		for(int i=1;i<=n;i++) printf("%d\n",val[i]);
	}
	return 0;
} 

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:14:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
./Main.cpp:16:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&f,&t),addedge(f,t);
                                   ^
./Main.cpp:17:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&k);
                ^
./Main.cpp:19:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&v,&p);
                      ^

Judge Result