Submission #587117

#	Time	Username	Problem	Language	Result	Execution time	Memory
587117		proma	Stove (JOI18_stove)	C++17	100 / 100	26 ms	4036 KiB

stove

#include <bits/stdc++.h>

#define int long long
#define see(x) cout<<#x<<"="<<x<<"\n";
#define endl "\n"

using namespace std;

const int N = 1e5+5;

int n, k, t[N], pos[N];

int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
/*
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
*/

    cin >> n >> k;

    vector <pair <int, int>> stop;
    for (int i = 0; i < n; i ++) {
        cin >> t[i];
    }
    for (int i = 0; i < n; i ++) {
        if (i + 1 < n) {
            stop.push_back({t[i+1] - t[i], i});
        }
    }

    sort(stop.rbegin(), stop.rend());

    for (int i = 0; i < k - 1; i ++) {
        pos[stop[i].second] = 1;
    }
    pos[n-1] = 1;

    int flag = 0, res = 0;
    for (int i = 0; i < n; i ++) {
        if (pos[i]) res ++;
        if (i and pos[i-1]) continue;
        if (i) res += t[i] - t[i-1];
    }

    cout << res << endl;

    return 0;
}

Compilation message (stderr)

stove.cpp: In function 'int32_t main()':
stove.cpp:40:9: warning: unused variable 'flag' [-Wunused-variable]
   40 |     int flag = 0, res = 0;
      |         ^~~~

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