Submission #1228812

#	Time	Username	Problem	Language	Result	Execution time	Memory
1228812		khoingu	Stove (JOI18_stove)	C++20	100 / 100	12 ms	1480 KiB

stove

#include <bits/stdc++.h>
#define ll long long
#define fi(i,a,b) for(int i = a; i <= b; i ++)
using namespace std;
const ll maxN = 1e5 + 5;

int n, k, t[maxN], ans = 0;
vector <int> tim;

signed main() {
    if (fopen("task.inp", "r")) {
        freopen("task.inp", "r", stdin);
        freopen("task.out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin >> n >> k;
    for(int i = 1; i <= n; i ++) {
        cin >> t[i];
    }
    ans = t[n] + 1 - t[1];
    for(int i = 2; i <= n; i ++) {
        tim.push_back(t[i] - t[i - 1] - 1);
    }
    sort(tim.rbegin(), tim.rend());
    //for(auto x : tim) cout << x << ' ';
    //k --;
    for(int i = 0; i < k - 1 and i < tim.size(); i ++) {
        ans -= tim[i];
    }
    cout << ans;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:12:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |         freopen("task.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:13:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |         freopen("task.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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