Submission #795888

#	Time	Username	Problem	Language	Result	Execution time	Memory
795888		rainboy	덩치 (KOI13_body)	C11	18 / 18	1 ms	340 KiB

bb

#include <stdio.h>

#define N	50

unsigned int X = 12345;

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

int xx[N], yy[N];

int compare_y(int i, int j) { return yy[i] - yy[j]; }
int compare_x(int i, int j) { return xx[i] != xx[j] ? xx[j] - xx[i] : yy[i] - yy[j]; }

int (*compare)(int, int);

void sort(int *ii, int l, int r) {
	while (l < r) {
		int i = l, j = l, k = r, i_ = ii[l + rand_() % (r - l)], tmp;

		while (j < k) {
			int c = compare(ii[j], i_);

			if (c == 0)
				j++;
			else if (c < 0) {
				tmp = ii[i], ii[i] = ii[j], ii[j] = tmp;
				i++, j++;
			} else {
				k--;
				tmp = ii[j], ii[j] = ii[k], ii[k] = tmp;
			}
		}
		sort(ii, l, i);
		l = k;
	}
}

int ft[N];

void update(int i, int n) {
	while (i < n) {
		ft[i]++;
		i |= i + 1;
	}
}

int query(int i) {
	int x = 0;

	while (i >= 0) {
		x += ft[i];
		i &= i + 1, i--;
	}
	return x;
}

int main() {
	static int ii[N], rr[N];
	int n, h, i, y;

	scanf("%d", &n);
	for (i = 0; i < n; i++)
		scanf("%d%d", &xx[i], &yy[i]);
	for (i = 0; i < n; i++)
		ii[i] = i;
	compare = compare_y, sort(ii, 0, n);
	for (h = 0, y = 0; h < n; h++)
		yy[ii[h]] = h + 1 == n || yy[ii[h + 1]] != yy[ii[h]] ? y++ : y;
	compare = compare_x, sort(ii, 0, n);
	for (h = 0; h < n; h++) {
		i = ii[h];
		rr[i] = query(n - 2 - yy[i]) + 1;
		update(n - 1 - yy[i], n);
	}
	for (i = 0; i < n; i++)
		printf("%d ", rr[i]);
	printf("\n");
	return 0;
}

Compilation message (stderr)

bb.c: In function 'main':
bb.c:63:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
bb.c:65:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |   scanf("%d%d", &xx[i], &yy[i]);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 2.7 / 2.7
• Subtask 2: 2.7 / 2.7
• Subtask 3: 2.7 / 2.7
• Subtask 4: 2.7 / 2.7
• Subtask 5: 2.7 / 2.7
• Subtask 6: 2.7 / 2.7
• Subtask 7: 1.8 / 1.8