Submission #41099

#	Time	Username	Problem	Language	Result	Execution time	Memory
41099		bugmenot111	Stove (JOI18_stove)	C++14	100 / 100	30 ms	1288 KiB

stove

#include <cstdio>
#include <algorithm>
#define MAXN 100100
int diff[MAXN], a[MAXN];
int main(void) {
	int n, k;
	scanf("%d%d", &n, &k);
	for(int i = 0; i < n; i++) scanf("%d", &a[i]);
	int ans = a[n - 1] - a[0] + 1;
	for(int i = 1; i < n; i++) diff[i] = a[i] - a[i - 1];
	std::sort(diff + 1, diff + n, std::greater<int>());
	for(int i = 1; i < k; i++) ans -= diff[i] - 1;
	printf("%d\n", ans);
	return 0;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:7:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &k);
                       ^
stove.cpp:8:47: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i = 0; i < n; i++) scanf("%d", &a[i]);
                                               ^

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