Submission #1257367

#	Time	Username	Problem	Language	Result	Execution time	Memory
1257367		ptgrama	Pizza (COCI21_pizza)	C++20	0 / 50	0 ms	328 KiB

Main

#include <bits/stdc++.h>
using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int N, K;
    cin >> N >> K;
    vector<long long> T(N);
    for (int i = 0; i < N; ++i) cin >> T[i];

    if (K >= N) {
        cout << N << "\n";
        return 0;
    }

    vector<long long> gaps;
    gaps.reserve(N - 1);
    for (int i = 0; i + 1 < N; ++i) {
        long long g = T[i+1] - T[i] - 1; // jarak dari akhir tamu i ke awal tamu i+1
        // karena "paling banyak satu tamu pada satu waktu", g >= 0
        gaps.push_back(g);
    }

    sort(gaps.begin(), gaps.end()); // naik
    long long extra = 0;
    int needMerge = N - K;
    for (int i = 0; i < needMerge; ++i) extra += gaps[i];

    long long ans = (long long)N + extra;
    cout << ans << "\n";
    return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10