Submission #222283

#	Time	Username	Problem	Language	Result	Execution time	Memory
222283		MODDI	Wall (IOI14_wall)	C++14	100 / 100	1062 ms	69648 KiB

wall

#include "wall.h"
#include <cstdio>
#include <algorithm>
 
using namespace std;
 
const int OFF = (1 << 21);
const int INF = 0x3f3f3f3f;
 
int mx[2 * OFF ], mi[2 * OFF];
 
void spoji(int j,int i){
	int olmi = mi[i];
	mx[i] = min(mx[i], mx[j]);
	mi[i] = max(mi[i], mi[j]);
	if(mi[i] > mx[i]){
		if(olmi < mi[j])
			mx[i] = mi[i];
		else
			mi[i] = mx[i];
	}
}
void prop(int i){
	if(i < OFF){
		spoji(i, 2 * i);
		spoji(i, 2 * i + 1);
		mx[i] = INF, mi[i] = 0;
	}
}
 
void update(int i,int a,int b,int lo,int hi){
	prop(i);
	if(lo <= a && b <= hi){
		spoji(0, i);
		prop(i);
		return;
	}
	if(a > hi || b < lo) return;
	update(2 * i, a, (a + b) / 2, lo, hi);
	update(2 * i + 1, (a + b) / 2 + 1, b, lo, hi);
 
 
}
 
void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
 
	for(int i = 0;i < k;i++){
		mi[0] = 0, mx[0] = INF;
		if(op[i] == 2) mx[0] = height[i];
		else           mi[0] = height[i];
		update(1, 0, OFF - 1, left[i], right[i]);
	}
	for(int i = 1;i < OFF;i++) prop(i);
	for(int i = 0;i < n;i++) finalHeight[i] = mi[OFF + i];
	return;
}

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