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Submission #475048

# Submission time Handle Problem Language Result Execution time Memory
475048 2021-09-20T20:16:05 Z rainboy Prosjek (COCI18_prosjek) C
50 / 50
 1 ms 204 KB 
#include <stdio.h>

#define N	20

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;
	double ans;

	scanf("%d", &n);
	for (i = 0; i < n; i++)
		scanf("%d", &aa[i]);
	sort(aa, 0, n);
	ans = aa[0];
	for (i = 1; i < n; i++)
		ans = (ans + aa[i]) / 2;
	printf("%.9f\n", ans);
	return 0;
}

Compilation message

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

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct