제출 #232338

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
232338		islingr	벽 (IOI14_wall)	C++14	100 / 100	701 ms	59384 KiB

wall

#include <iostream>
using namespace std;

const int inf = 1e9, N = 1 << 22;
int mx[N], mn[N];

void change(int v, int d, int u) {
	mn[v] = max(u, min(d, mn[v]));
	mx[v] = min(d, max(u, mx[v]));
}

void push(int v) {
	change(v << 1|0, mn[v], mx[v]);
	change(v << 1|1, mn[v], mx[v]);
	mx[v] = 0; mn[v] = inf;
}

int d, u, lo, hi;
void update(int v, int l, int r) {
	if (hi <= l || r <= lo) return;
	if (lo <= l && r <= hi) return change(v, d, u);
	push(v); int m = (l + r) / 2;
	update(v << 1|0, l, m);
	update(v << 1|1, m, r);
}

void final(int ans[], int v, int l, int r) {
	if (r - l == 1)
		return void(ans[l] = min(mx[v], mn[v]));
	push(v); int m = (l + r) / 2;
	final(ans, v << 1|0, l, m);
	final(ans, v << 1|1, m, r);
}

void buildWall(int n, int q, int op[], int l[], int r[], int h[], int ans[]) {
	for (int i = 0; i < N; ++i) mn[i] = inf, mx[i] = 0;
	for (int i = 0; i < q; ++i) {
		lo = l[i]; hi = r[i] + 1;
		if (op[i] != 1) d = h[i], u = 0;
		else d = inf, u = h[i];
		update(1, 0, n);
	}
	final(ans, 1, 0, n);
}

• Subtask 1: 8 / 8
• Subtask 2: 24 / 24
• Subtask 3: 29 / 29
• Subtask 4: 39 / 39