Submission #122829

#	Time	Username	Problem	Language	Result	Execution time	Memory
122829		turbat	Wall (IOI14_wall)	C++14	61 / 100	557 ms	32248 KiB

wall

#include <bits/stdc++.h>
#include "wall.h"
using namespace std;
#define N 500005

int lim[4 * N], seg[4 * N], h[N];

void clear(int nd){
	seg[nd * 2] = max(seg[nd * 2], min(lim[nd * 2], seg[nd]));
	seg[nd * 2 + 1] = max(seg[nd * 2 + 1], min(lim[nd * 2 + 1], seg[nd]));
  	lim[nd * 2] = min(lim[nd * 2], lim[nd]);
	lim[nd * 2 + 1] = min(lim[nd * 2 + 1], lim[nd]);
}

void update(int nd, int L, int R, int l, int r, int h, int t){
	// cout << nd << ' '<< L << ' ' << R<< endl;
	if (r < L || R < l) return;
	if (t == 1)	h = min(h, lim[nd]);
	if (l <= L && R <= r){
		if (t == 1) seg[nd] = max(seg[nd], h);
		else lim[nd] = min(h, lim[nd]);
		return;
	}
	clear(nd);
	update(nd * 2, L, (L + R) / 2, l, r, h, t);
	update(nd * 2 + 1, (L + R) / 2 + 1, R, l, r, h, t);
}

void end(int nd, int l, int r){
	if (l == r){
		h[l] = seg[nd];
		return;
	}
	clear(nd);
	end(nd * 2, l, (l + r) / 2);
	end(nd * 2 + 1, (l + r) / 2 + 1, r);
}

void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
	for (int i = 0;i <= 4 * n;i++) lim[i] = 2e9;
	for (int i = k - 1;i >= 0;i--) update(1, 0, n - 1, left[i], right[i], height[i], op[i]); 
	end(1, 0, n - 1);
	for (int i = 0;i < n;i++) finalHeight[i] = h[i];
}

• Subtask 1: 8 / 8
• Subtask 2: 24 / 24
• Subtask 3: 29 / 29
• Subtask 4: 0 / 39