Submission #542048

#	Time	Username	Problem	Language	Result	Execution time	Memory
542048		lunchbox	Stove (JOI18_stove)	C++17	100 / 100	20 ms	1696 KiB

stove

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

int main() {
	int n, k, ans;
	scanf("%d%d", &n, &k), k--;
	vector<int> a(n);
	for (int &x : a)
		scanf("%d", &x);
	ans = a[n - 1] - a[0] + 1;
	for (int i = 0; i + 1 < n; i++)
		a[i] = a[i + 1] - a[i] - 1;
	a.pop_back();
	sort(a.rbegin(), a.rend());
	for (int i = 0; i < k; i++)
		ans -= a[i];
	printf("%d\n", ans);
	return 0;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:6:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    6 |  scanf("%d%d", &n, &k), k--;
      |  ~~~~~^~~~~~~~~~~~~~~~
stove.cpp:9:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |   scanf("%d", &x);
      |   ~~~~~^~~~~~~~~~

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