Submission #879255

#	Time	Username	Problem	Language	Result	Execution time	Memory
879255		marcid	Wall (IOI14_wall)	C++17	100 / 100	560 ms	77648 KiB

wall

#include "wall.h"
#include <bits/stdc++.h>
using namespace std;
#define vb vector<bool>
#define vi vector<int>
#define ii pair<int,int>
#define iii tuple<int,int,int>
#define vii vector<ii>
#define viii vector<iii>
#define pb push_back
#define eb emplace_back
#define mod 1000000007
const int maxn = 1<<21;
ii tree[(maxn<<2)+2];

void push(int v) {
	tree[v<<1].first=min(max(tree[v<<1].first,tree[v].first),tree[v].second);
	tree[v<<1|1].first=min(max(tree[v<<1|1].first,tree[v].first),tree[v].second);
	tree[v<<1].second=min(max(tree[v].first,tree[v<<1].second),tree[v].second);
	tree[v<<1|1].second=min(max(tree[v].first,tree[v<<1|1].second),tree[v].second);
}

void update(int t, int l, int r, int x, int v, int tl, int tr) {
	if (tl > r || l > tr) return;
	if (l <= tl && tr <= r) {
		if (t-1) {
			tree[v].first=min(tree[v].first,x);
			tree[v].second=min(tree[v].second,x);
		} else {
			tree[v].first=max(tree[v].first, x);
			tree[v].second=max(tree[v].second,x);
		} return;
	} 
	push(v);
	int mid = tl + tr >> 1;
	update(t,l,r,x,v*2,tl,mid); update(t,l,r,x,v*2+1,mid+1,tr);
	tree[v].first=min(tree[v<<1].first,tree[v<<1|1].first);
	tree[v].second=max(tree[v<<1].second,tree[v<<1|1].second);
}
int fin[maxn];
void build(int v, int tl, int tr) {
	if (tl==tr) {
		fin[tl]=tree[v].first;
		return;
	}
	push(v);
	int mid = tl + tr >> 1;
	build(v*2,tl,mid); build(v*2+1,mid+1,tr);
}

void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]) {
	for (int i = 0; i < k; i++) {
		update(op[i],left[i],right[i],height[i],1,0,n+10);
	} build(1,0,n+10); for (int i = 0; i < n; i++) finalHeight[i]=fin[i];
}

Compilation message (stderr)

wall.cpp: In function 'void update(int, int, int, int, int, int, int)':
wall.cpp:35:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   35 |  int mid = tl + tr >> 1;
      |            ~~~^~~~
wall.cpp: In function 'void build(int, int, int)':
wall.cpp:47:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   47 |  int mid = tl + tr >> 1;
      |            ~~~^~~~

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