제출 #1009456

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1009456		rsinventor	Ronald (COCI17_ronald)	C++17	120 / 120	29 ms	7704 KiB

ronald

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef vector<bool> vb;
typedef vector <string> vs;
typedef vector<char> vc;
typedef pair<int, int> pii;
typedef vector <pii> vpii;

#define all(a) (a).begin(), (a).end()
#define pb push_back
#define endl "\n"

#define MAX_N static_cast<ll>(1e3+5)
vi adj[MAX_N];
int comp[MAX_N];
int comp_size[MAX_N];
bool visited[MAX_N];
int comp_cnt = 0;

void dfs(int start) {
    visited[start] = true;
    comp[start] = comp_cnt;
    comp_size[comp_cnt]++;
    for(int a: adj[start]) {
        if(!visited[a]) dfs(a);
    }
}

int out(int res) {
    if(res) {
        cout << "DA" << endl;
    } else {
        cout << "NE" << endl;
    }
    return 0;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int n;
    cin >> n;
    int m;
    cin >> m;
    vpii edges;
    for(int i = 0; i < m; i++) {
        int a, b;
        cin >> a >> b;
        adj[a].pb(b);
        adj[b].pb(a);
        edges.pb({a, b});
    }

    for(int i = 1; i <= n; i++) {
        if(!visited[i]) {
            dfs(i);
            comp_cnt++;
            if(comp_cnt>2) break;
        }
    }

    if(comp_cnt!=2) return out(0);

    vi comp_edges(MAX_N);
    for(int i = 0; i < m; i++) {
        comp_edges[comp[edges[i].first]]++;
    }

    if((comp_size[0] * (comp_size[0]-1))/2==comp_edges[0] && (comp_size[1] * (comp_size[1]-1))/2==comp_edges[1]) {
        return out(1);
    } else {
        return out(0);
    }

    return 0;
}

• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 15 / 15
• Subtask 4: 15 / 15
• Subtask 5: 15 / 15
• Subtask 6: 15 / 15
• Subtask 7: 15 / 15
• Subtask 8: 15 / 15