Submission #705287

#	Time	Username	Problem	Language	Result	Execution time	Memory
705287		rainboy	Foehn Phenomena (JOI17_foehn_phenomena)	C11	100 / 100	140 ms	11492 KiB

foehn_phenomena

#include <stdio.h>

#define N	200000

int main() {
	static long long aa[N + 1];
	int n, q, s, t, i;
	long long ans;

	scanf("%d%d%d%d", &n, &q, &s, &t);
	for (i = 0; i <= n; i++)
		scanf("%lld", &aa[i]);
	for (i = n; i > 0; i--)
		aa[i] -= aa[i - 1];
	ans = 0;
	for (i = 1; i <= n; i++)
		ans -= aa[i] > 0 ? s * aa[i] : t * aa[i];
	while (q--) {
		int l, r, x;

		scanf("%d%d%d", &l, &r, &x);
		ans += aa[l] > 0 ? s * aa[l] : t * aa[l];
		aa[l] += x;
		ans -= aa[l] > 0 ? s * aa[l] : t * aa[l];
		if (r < n) {
			ans += aa[r + 1] > 0 ? s * aa[r + 1] : t * aa[r + 1];
			aa[r + 1] -= x;
			ans -= aa[r + 1] > 0 ? s * aa[r + 1] : t * aa[r + 1];
		}
		printf("%lld\n", ans);
	}
	return 0;
}

Compilation message (stderr)

foehn_phenomena.c: In function 'main':
foehn_phenomena.c:10:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |  scanf("%d%d%d%d", &n, &q, &s, &t);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foehn_phenomena.c:12:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |   scanf("%lld", &aa[i]);
      |   ^~~~~~~~~~~~~~~~~~~~~
foehn_phenomena.c:21:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |   scanf("%d%d%d", &l, &r, &x);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 10 / 10
• Subtask 3: 60 / 60