제출 #446920

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
446920		rainboy	Zoltan (COCI16_zoltan)	C11	140 / 140	179 ms	8348 KiB

zoltan

#include <stdio.h>
#include <string.h>

#define N	200000
#define MD	1000000007

unsigned int X;

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

int aa[N];

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)
			if (aa[ii[j]] == aa[i_])
				j++;
			else if (aa[ii[j]] < aa[i_]) {
				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 ft1[N], ft2[N];

void update(int i, int n, int x, int y) {
	while (i < n) {
		if (ft1[i] < x)
			ft1[i] = x, ft2[i] = 0;
		if (ft1[i] == x)
			ft2[i] = (ft2[i] + y) % MD;
		i |= i + 1;
	}
}

void query(int i, int *x, int *y) {
	*x = 0, *y = 1;
	while (i >= 0) {
		if (*x < ft1[i])
			*x = ft1[i], *y = 0;
		if (*x == ft1[i])
			*y = (*y + ft2[i]) % MD;
		i &= i + 1, i--;
	}
}

int main() {
	static int ii[N], dp1[N], dp2[N], dq1[N], dq2[N];
	int n, i, a, x_, y_;

	scanf("%d", &n);
	for (i = 0; i < n; i++) {
		scanf("%d", &aa[i]);
		ii[i] = i;
	}
	sort(ii, 0, n);
	for (i = 0, a = 0; i < n; i++)
		aa[ii[i]] = i + 1 == n || aa[ii[i + 1]] != aa[ii[i]] ? a++ : a;
	memset(ft1, 0, n * sizeof *ft1), memset(ft2, 0, n * sizeof *ft2);
	for (i = n - 1; i >= 0; i--)
		query(aa[i] - 1, &dp1[i], &dp2[i]), dp1[i]++, update(aa[i], n, dp1[i], dp2[i]);
	memset(ft1, 0, n * sizeof *ft1), memset(ft2, 0, n * sizeof *ft2);
	for (i = n - 1; i >= 0; i--)
		query(n - 1 - aa[i] - 1, &dq1[i], &dq2[i]), dq1[i]++, update(n - 1 - aa[i], n, dq1[i], dq2[i]);
	x_ = -1, y_ = 0;
	for (i = 0; i < n; i++) {
		int x = dp1[i] + dq1[i] - 1, y = (long long) dp2[i] * dq2[i] % MD;

		if (x_ < x)
			x_ = x, y_ = 0;
		if (x_ == x)
			y_ = (y_ + y) % MD;
	}
	for (i = 0; i < n - x_; i++)
		y_ = y_ * 2 % MD;
	printf("%d %d\n", x_, y_);
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

zoltan.c: In function 'main':
zoltan.c:61:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
zoltan.c:63:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |   scanf("%d", &aa[i]);
      |   ^~~~~~~~~~~~~~~~~~~

• Subtask 1: 140 / 140