131612025-01-06 19:34:38bzyÚthasználati díj (75 pont)python3Runtime error 0/7516ms3224 KiB
#include <bits/stdc++.h>
using namespace std;
#define ll  long long

int main()
{
    int n, k; cin >> n >> k;
    vector <int> A(n);
    int utidijas = 0;
    for(int i = 0; i < n; i++)
    {
        cin >> A[i];
        if(A[i] == 1) utidijas++;
    }
    int ans = 0;
    ans += (utidijas - k + 1) * (k-1);
    ans += (utidijas - k) * (utidijas - k - 1) / 2;
    if(ans < 0) cout << 0;
    else cout << ans;
    return 0;
}
SubtaskSumTestVerdictTimeMemory
base0/75
1Runtime error0/014ms3052 KiB
2Runtime error0/016ms2864 KiB
3Runtime error0/016ms2868 KiB
4Runtime error0/514ms3056 KiB
5Runtime error0/514ms2904 KiB
6Runtime error0/516ms2816 KiB
7Runtime error0/514ms2964 KiB
8Runtime error0/516ms2864 KiB
9Runtime error0/516ms2896 KiB
10Runtime error0/516ms2872 KiB
11Runtime error0/516ms3040 KiB
12Runtime error0/516ms2868 KiB
13Runtime error0/514ms3044 KiB
14Runtime error0/514ms2984 KiB
15Runtime error0/516ms2984 KiB
16Runtime error0/514ms3060 KiB
17Runtime error0/514ms2868 KiB
18Runtime error0/514ms3224 KiB