제출 #880159

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
880159		JoksimKaktus	Cijanobakterije (COCI21_cijanobakterije)	C++17	15 / 70	111 ms	10616 KiB

Main

#include <bits/stdc++.h>

using namespace std;
using ll = long long;
void output(bool yes){yes ? cout << "Yes" << "\n" : cout << "No" << "\n";}

vector <int> adj[100005];
int point = 1;
int maxi = 1;
vector <bool> vis(100005);

void dfs(int i,int p,int cur){
    vis[i]=true;
    if(cur > maxi){
        maxi = cur;
        point = i;
    }
    for(int j : adj[i]){
        if(j != p){
            dfs(j,i,cur+1);
        }
    }
}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(0);
    int n,m;
    cin >> n >> m;
    for(int i = 0;i < m;i++){
        int u,v;
        cin >> u >> v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    int res = 0;
    for(int i = 1;i <= n;i++){
        if(!vis[i]){
            dfs(i,-1,1);
            dfs(point,-1,1);
            res += maxi;
            maxi = 1;
            point = 1;
        }
    }
    cout << res << "\n";
    return 0;
}

• Subtask 1: 15 / 15
• Subtask 2: 0 / 6
• Subtask 3: 0 / 6
• Subtask 4: 0 / 15
• Subtask 5: 0 / 28