제출 #77107

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
77107		thebes	새로운 문제 (POI13_luk)	C++14	0 / 100	287 ms	30920 KiB

luk

#include <bits/stdc++.h>
using namespace std;

const int MN = 3e5+5;
int vis[MN], N, i, x, y, ans;
vector<int> adj[MN];
queue<int> q;
void rec(){
	int sz = q.size();
	while(sz --){
		int c=q.front(); q.pop();
		for(auto v : adj[c]){
			if(!vis[v]){
				vis[v] = 1;
				q.push(v);
			}
		}
	}
	ans = max(ans, (int)q.size());
	if(q.size()) rec();
}
int main(){
	for(scanf("%d",&N),i=1;i<N;i++){
		scanf("%d%d",&x,&y);
		adj[x].push_back(y);
		adj[y].push_back(x);
	}
	q.push(1); vis[1]=1;
	rec();
	printf("%d\n",ans);
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

luk.cpp: In function 'int main()':
luk.cpp:23:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(scanf("%d",&N),i=1;i<N;i++){
      ~~~~~~~~~~~~~~^~~~
luk.cpp:24:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&x,&y);
   ~~~~~^~~~~~~~~~~~~~

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