Submission #1351258

#	Time	Username	Problem	Language	Result	Execution time	Memory
1351258		nguthianmangcay	Stove (JOI18_stove)	C++20	100 / 100	18 ms	1468 KiB

stove

#include<bits/stdc++.h>
using namespace std;
const int N=1e5+3;
const long long inf=1e18+3;
#define ll long long
#define fi first
#define se second
#define VOI void

int a[N];

VOI jiangly(){

    int n,k;
    cin>>n>>k;
    for(int i=1;i<=n;i++)cin>>a[i];
    sort(a+1,a+1+n);
    priority_queue<int>q;
    for(int i=2;i<=n;i++){
        q.push(a[i] - a[i-1]-1);
    }
    ll ans = a[n] - a[1] + 1;
    int cnt = 0;
    while(!q.empty() && cnt < k - 1){
        cnt++;
        ll add = q.top();
        q.pop();
        ans -= add;
    }
    cout<<ans;

}
int main(){
    cin.tie(0)->sync_with_stdio(0);
    if(fopen("QUANSENSEI.inp","r")){
        freopen("O(0).inp","r",stdin);
    }

//    if(fopen("input.txt","r")){
//        freopen("input.txt","r",stdin);
//        freopen("output.txt","w",stdout);
//    }
    jiangly();

//    cerr << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:36:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |         freopen("O(0).inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

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