Submission #392845

#	Time	Username	Problem	Language	Result	Execution time	Memory
392845		rainboy	Akcija (COCI15_akcija)	C11	80 / 80	24 ms	1228 KiB

akcija

#include <stdio.h>

#define N	100000

unsigned int X = 12345;

int rand_() {
	return (X *= 3) >> 1;
}

void sort(int *aa, int l, int r) {
	while (l < r) {
		int i = l, j = l, k = r, a = aa[l + rand_() % (r - l)], tmp;
		
		while (j < k)
			if (aa[j] == a)
				j++;
			else if (aa[j] < a) {
				tmp = aa[i], aa[i] = aa[j], aa[j] = tmp;
				i++, j++;
			} else {
				k--;
				tmp = aa[j], aa[j] = aa[k], aa[k] = tmp;
			}
		sort(aa, l, i);
		l = k;
	}
}

int main() {
	static int aa[N];
	int n, i;
	long long ans;

	scanf("%d", &n);
	for (i = 0; i < n; i++)
		scanf("%d", &aa[i]);
	sort(aa, 0, n);
	ans = 0;
	for (i = 0; i < n; i++)
		if ((n - i) % 3 != 0)
			ans += aa[i];
	printf("%lld\n", ans);
	return 0;
}

Compilation message (stderr)

akcija.c: In function 'main':
akcija.c:35:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   35 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
akcija.c:37:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   37 |   scanf("%d", &aa[i]);
      |   ^~~~~~~~~~~~~~~~~~~

• Subtask 1: 80 / 80