Submission #37323

#	Time	Username	Problem	Language	Result	Execution time	Memory
37323		14kg	medians (balkan11_medians)	C++11	100 / 100	173 ms	12592 KiB

medians

#include <stdio.h>
#include <set>

using namespace std;
int n, nn, tree[524288];
set<int> S;

void Update(int lev) {
	tree[lev] = tree[lev * 2] + tree[lev * 2 + 1];
	if (lev > 1) Update(lev / 2);
}
void Push(int x) {
	S.erase(x), printf("%d ", x);
	tree[nn + x - 1] = 1, Update((nn + x - 1) / 2);
}
void P_left() {
	set<int>::iterator it = S.begin();
	Push(*it);
}
void P_right() {
	set<int>::iterator it = S.end();
	it--, Push(*it);
}
int f(int lev, int l, int r, int x, int y) {
	int mid = (l + r) / 2;

	if (x <= l && r <= y) return tree[lev];
	if (r < x || y < l) return 0;
	return f(lev * 2, l, mid, x, y) + f(lev * 2 + 1, mid + 1, r, x, y);
}
int main() {
	int x;

	scanf("%d", &n);
	for (nn = 1; nn < 2 * n - 1; nn *= 2);
	for (int i = 1; i < 2 * n; i++) S.insert(i);

	for (int i = 1; i <= n; i++) {
		scanf("%d", &x);
		if (i == 1) {
			Push(x);
			continue;
		}

		int left = f(1, 1, nn, 1, x), right = f(1, 1, nn, x, nn);
		if (!tree[nn + x - 1]) {
			Push(x);
			if (left > right) P_right();
			else P_left();
		}
		else if (left > right) P_right(), P_right();
		else if (left == right) P_left(), P_right();
		else P_left(), P_left();
	}
}

Compilation message (stderr)

medians.cpp: In function 'int main()':
medians.cpp:34:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
                 ^
medians.cpp:39:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &x);
                  ^

• Subtask 1: 65 / 65
• Subtask 2: 35 / 35