제출 #1143275

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1143275		adimiclaus15	새로운 문제 (POI13_luk)	C++20	0 / 100	161 ms	20804 KiB

luk

#pragma GCC optimize("O3,unroll-loops")
#include <bits/stdc++.h>

using namespace std;
const int NMAX = 3e5;
vector<int>G[NMAX+5];
int viz[NMAX+5],vkids[NMAX+5];
int nivel[NMAX+5];
void DFS(int nod,int niv){
    viz[nod]=1;int kids=0;nivel[nod]=niv;
    for(int i=0;i<G[nod].size();i++){
        if(viz[G[nod][i]]==0){
            DFS(G[nod][i],niv+1);kids++;
        }
    }
    vkids[nod]=kids;
}
int main()
{
    int n,a,b;cin>>n;
    for(int i=1;i<n;i++){
        cin>>a>>b;
        G[a].push_back(b);G[b].push_back(a);
    }
    if(n==1){cout<<"0"<<'\n';return 0;}
    DFS(1,1);int rez=0;int maxniv=0;
    for(int i=1;i<=n;i++){
       maxniv=max(maxniv,nivel[i]);
    }maxniv--;
    rez=((n-1)/maxniv);if(((n-1)%maxniv)!=0){rez++;}
    cout<<rez<<'\n';
    return 0;
}

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