Submission #1047399

#	Time	Username	Problem	Language	Result	Execution time	Memory
1047399		lamlamlam	Stove (JOI18_stove)	C++17	100 / 100	15 ms	3512 KiB

stove

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl '\n'
const int MN = 1e5+5;
int n,k,a[MN];
vector<int> v;

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    #define task "troll"
    if(fopen(task".inp","r")){
        freopen(task".inp","r",stdin);
        freopen(task".out","w",stdout);
    }
    cin >> n >> k;
    for(int i=1; i<=n; i++) cin >> a[i];
    sort(a+1,a+1+n);
    for(int i=2; i<=n; i++) v.push_back(a[i]-a[i-1]-1);
    sort(v.begin(),v.end());
    int ans = a[n]-a[1]+1;
    k--;
    for(int i=n-2; i>=0; i--){
        if(k==0) break;
        k--;
        ans -= v[i];
    }
    cout << ans;
    cerr << "\nTime: " << 1000.0 * clock() / CLOCKS_PER_SEC << endl;
}

Compilation message (stderr)

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

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