Submission #385431

#	Time	Username	Problem	Language	Result	Execution time	Memory
385431		Keshi	Wall (IOI14_wall)	C++17	100 / 100	793 ms	97388 KiB

wall

//In the name of God
#include <bits/stdc++.h>
#include "wall.h"
using namespace std;

typedef int ll;
typedef pair<ll, ll> pll;

const ll maxn = 2e6 + 100;
const ll mod = 1e9 + 7;
const ll inf = 1e9;

#define fast_io ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file_io freopen("input.txt", "r+", stdin);freopen("output.txt", "w+", stdout);
#define pb push_back
#define Mp make_pair
#define F first
#define S second
#define Sz(x) ll((x).size())
#define all(x) (x).begin(), (x).end()
#define lc (id << 1)
#define rc (lc | 1)

pll seg[maxn << 2];
ll ans[maxn];

pll Do(pll f, pll s){
	if(f.S < s.F) return Mp(s.F, s.F);
	if(f.F > s.S) return Mp(s.S, s.S);
	return Mp(max(f.F, s.F), min(f.S, s.S));
}
void shift(ll id){
	seg[lc] = Do(seg[lc], seg[id]);
	seg[rc] = Do(seg[rc], seg[id]);
	seg[id] = Mp(0, inf);
	return;
}

void upd(ll id, ll s, ll e, ll l, ll r, pll x){
	if(r <= s || e <= l) return;
	if(l <= s && e <= r){
		seg[id] = Do(seg[id], x);
		return;
	}
	ll mid = (s + e) >> 1;
	shift(id);
	upd(lc, s, mid, l, r, x);
	upd(rc, mid, e, l, r, x);
	return;
}
void fix(ll id, ll s, ll e){
	if(e - s == 1){
		ans[s] = seg[id].F;
		return;
	}
	ll mid = (s + e) >> 1;
	shift(id);
	fix(lc, s, mid);
	fix(rc, mid, e);
	return;
}

void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
	fill(seg, seg + (n << 2), Mp(0, inf));
	for(ll i = 0; i < k; i++){
		if(op[i] == 1){
			upd(1, 0, n, left[i], right[i] + 1, Mp(height[i], inf));
		}
		else{
			upd(1, 0, n, left[i], right[i] + 1, Mp(0, height[i]));
		}
	}
	fix(1, 0, n);
	for(ll i = 0; i < n; i++){
		finalHeight[i] = ans[i];
	}
	return;
}


/*int main(){
    fast_io;



    return 0;
}*/

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