Submission #961917

#	Time	Username	Problem	Language	Result	Execution time	Memory
961917		Irate	Monthly railway pass (LMIO18_menesinis_bilietas)	C++17	16 / 100	166 ms	34244 KiB

menesinis_bilietas

#include <bits/stdc++.h>
using namespace std;
const int mxN = 5e5 + 5;
struct DSU{
    vector<int>par;
    int comps;
    DSU(int n){
        par.assign(n + 1, -1);
        comps = n;
    }
    int FindRep(int u){
        if(par[u] < 0)return u;
        return par[u] = FindRep(par[u]);
    }
    void Union(int u, int v){
        u = FindRep(u);
        v = FindRep(v);
        if(u == v)return;
        if(par[u] > par[v])swap(u, v);
        par[u] += par[v];
        par[v] = u;
        comps--;
    }
};

vector<int> G[mxN];
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, m;
    cin >> n >> m;
    int cnt = 0;
    /// A - bus, T - train
    DSU dsu(n);
    for(int i = 0;i < m;++i){
        int u, v;
        char c;
        cin >> u >> v >> c;
        cnt += (c == 'A');
        dsu.Union(u, v);
        G[u].push_back(v);
        G[v].push_back(u);
    }
    if(dsu.comps != 1){
        cout << 0 << '\n';
    }
    else if(cnt == 0){
        cout << n << '\n';
    }
    else{
        int cnt2 = 0;   
        for(int i = 1;i <= n;++i){
            cnt2 += ((int)G[i].size() == n - 1);
        }
        cout << cnt2 << '\n';
    }
}

• Subtask 1: 10 / 10
• Subtask 2: 6 / 6
• Subtask 3: 0 / 30
• Subtask 4: 0 / 35
• Subtask 5: 0 / 19