Submission #1290789

#	Time	Username	Problem	Language	Result	Execution time	Memory
1290789		stefanneagu	Parking (CEOI22_parking)	C++20	2 / 100	73 ms	138900 KiB

Main

#include <bits/stdc++.h>
#define int long long

using namespace std;

const int nmax = 3e5 + 1, mod = 1e9 + 7, inf = 1e18;

int32_t main() {
    int n, m, unm;
    cin >> n >> m;
    unm = n;
    map<int, int> f;
    for (int i = 1; i <= m; i++) {
        int a, b;
        cin >> a >> b;
        if (a == b && a != 0) unm--;
        if (b != 0) f[b]++;
    }
    for (auto it : f) unm += (it.second == 2);
    cout << unm;
    return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 2 / 10
• Subtask 3: 0 / 25
• Subtask 4: 0 / 15
• Subtask 5: 0 / 25
• Subtask 6: 0 / 15