Submission #450422

#	Time	Username	Problem	Language	Result	Execution time	Memory
450422		rainboy	Pareto (COCI17_pareto)	C11	80 / 80	77 ms	2960 KiB

pareto

#include <stdio.h>

#define N	300000

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, i_;
	long long sum, sum_, sum1, x, x_;

	scanf("%d", &n);
	sum_ = 0;
	for (i = 0; i < n; i++) {
		scanf("%d", &aa[i]);
		sum_ += aa[i];
	}
	sort(aa, 0, n);
	sum = 0, x_ = 0, i_ = n, sum1 = 0;
	for (i = n - 1; i >= 0; i--) {
		sum += aa[i], x = (long long) sum * n - (long long) sum_ * (n - i);
		if (x_ < x)
			x_ = x, i_ = i, sum1 = sum;
	}
	printf("%f\n", (double) (n - i_) * 100 / n);
	printf("%f\n", (double) sum1 * 100 / sum_);
	return 0;
}

Compilation message (stderr)

pareto.c: In function 'main':
pareto.c:35:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
pareto.c:38:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |   scanf("%d", &aa[i]);
      |   ^~~~~~~~~~~~~~~~~~~

• Subtask 1: 80 / 80