제출 #1252699

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1252699		VKhang	Stove (JOI18_stove)	C++20	100 / 100	15 ms	1988 KiB

stove

#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 5, MOD = 1e9 + 7;
const long long L = 1e18;
#define ll long long
#define fi first
#define se second
#define yes {cout << "YES";return;}
#define no  {cout << "NO"; return;}
#define pb push_back
#define MASK(i) (1ll << (i))
#define BIT(i, s) ((1ll << (i)) & (s))
#define all(a) a.begin(), a.end()
int n, k;
int a[N];
void solve()
{
    cin >> n >> k;
    for (int i = 1; i <= n; i++){
        cin >> a[i];
    }
    vector <pair <int, int>> s;
    for (int i = 1; i < n; i++){
        s.pb({a[i + 1] - a[i] - 1, i});
    }
    sort(all(s));
    int ans = n;
    for (int i = 0; i < s.size() && n > k; i++){
        ans += s[i].fi;
        n--;
    }
    cout << ans;
}
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);cout.tie(NULL);
    if (fopen("VKhang.inp","r")){
        freopen("VKhang.inp","r",stdin);
        freopen("VKhang.out","w",stdout);
    }
    solve();
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

stove.cpp: In function 'int main()':
stove.cpp:38:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |         freopen("VKhang.inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:39:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |         freopen("VKhang.out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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