Submission #1241941

#	Time	Username	Problem	Language	Result	Execution time	Memory
1241941		hanguyen	Stove (JOI18_stove)	C++20	100 / 100	13 ms	2244 KiB

stove

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

const int maxn = 1e5 + 5 ;
int n , k;
int a[maxn];
vector<int>res;

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    if (fopen(".inp", "r")) {
        freopen(".inp", "r", stdin);
        freopen(".out", "w", stdout);
    }
    cin >> n >> k;
    for(int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    sort(a + 1, a + n + 1);
    for(int i = 1; i < n; i++) {
        int diff = a[i + 1] - a[i] - 1;
        res.push_back(diff);
    }
    sort(res.begin(),res.end());
    int ans = n;
    for(int i = 0; i < n - k; i++) ans += res[i];
    cout << ans;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:14:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |         freopen(".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~
stove.cpp:15:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |         freopen(".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~

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