Submission #525902

#	Time	Username	Problem	Language	Result	Execution time	Memory
525902		buidangnguyen05	Stove (JOI18_stove)	C++14	100 / 100	17 ms	1100 KiB

stove

/* input

*/

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

typedef long long ll;
const int N = 1e5 + 10;
int a[N], b[N];

signed main() {
	cin.tie(0)->sync_with_stdio(0);
	if (fopen("task.inp", "r")) {
		freopen("task.inp", "r", stdin);
		freopen("task.out", "w", stdout);
	}
	
	int n, k; cin >> n >> k; --k;
	for (int i = 1; i <= n; ++i) cin >> a[i];
	for (int i = 1; i < n; ++i) b[i] = a[i + 1] - a[i] - 1;

	int res = a[n] - a[1] + 1;
	sort(b + 1, b + n, greater<int>());
	for (int i = 1; i <= k; ++i) res -= b[i];
	cout << res << "\n";
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:15:10: 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:16:10: 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