Submission #867401

#	Time	Username	Problem	Language	Result	Execution time	Memory
867401		cheat_when_I_was_young	Stove (JOI18_stove)	C++17	100 / 100	16 ms	2152 KiB

stove

#include "bits/stdc++.h"
using namespace std;
void solve();
bool multitest();
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    clock_t TIME = clock();
    int TEST = 1;
    if (multitest()) cin >> TEST;
    while (TEST--) solve();
    cerr << "\nUsed: " << clock() - TIME << " ms\n\n";
}

bool multitest() {
    return 0;
}

const int NM = 1e5 + 5;

int n, k, a[NM], b[NM];

void solve() {
    cin >> n >> k;
    for (int i = 1; i <= n; ++i) cin >> a[i];

    for (int i = 1; i < n; ++i) b[i] = a[i+1] - a[i] - 1;
    sort(b+1, b+n);

    long long ans = n;

    for (int i = 1; i <= n-k; ++i) ans += b[i];

    cout << ans;
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50