제출 #90839

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
90839		Vardanyan	새로운 문제 (POI13_luk)	C++14	0 / 100	249 ms	17616 KiB

luk

#include<bits/stdc++.h>

using namespace std;

const int N = 300*1000+5;
int depth[N];
vector<int> g[N];
int mark[N];
bool F = true;
int dp[N];
int ans = 0;
void dfs(int v,int p = -1){
    int x = g[v].size();
    if(p!=-1) x--;
    for(int i = 0;i<g[v].size();i++){
        int to = g[v][i];
        dp[to] = max(dp[to],dp[v]);
        dp[to] = max(dp[to],x);
        ans = max(ans,dp[to]);
    }
}
int main()
{
    int n;
    scanf("%d",&n);
    for(int i = 1;i<=n-1;i++){
        int x,y;
        scanf("%d%d",&x,&y);
        g[x].push_back(y);
        g[y].push_back(x);
    }
    if(n == 1){
        printf("0\n");
        return 0;
    }
    dfs(1);
    cout<<ans<<endl;
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

luk.cpp: In function 'void dfs(int, int)':
luk.cpp:15:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0;i<g[v].size();i++){
                   ~^~~~~~~~~~~~
luk.cpp: In function 'int main()':
luk.cpp:25:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
luk.cpp:28:14: 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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