Submission #281826

#	Time	Username	Problem	Language	Result	Execution time	Memory
281826		BeanZ	Stove (JOI18_stove)	C++14	100 / 100	32 ms	3324 KiB

stove

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define endl '\n'
const int N = 1e5 + 5;
const int mod = 1e9 + 7;
ll a[100005];
int main(){
        ios_base::sync_with_stdio(false);
        cin.tie(0);
        if (fopen("VietCT.INP", "r")){
                freopen("VietCT.INP", "r", stdin);
                freopen("VietCT.OUT", "w", stdout);
        }
        ll n, k;
        cin >> n >> k;
        for (int i = 1; i <= n; i++) cin >> a[i];
        ll ans = a[n] - a[1] + 1;
        k--;
        priority_queue<ll> pq;
        for (int i = 2; i <= n; i++){
                pq.push(a[i] - a[i - 1] - 1);
        }
        while (k){
                ans -= pq.top();
                pq.pop();
                k--;
        }
        cout << ans;
}
/*
*/

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:14:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   14 |                 freopen("VietCT.INP", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:15:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   15 |                 freopen("VietCT.OUT", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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