제출 #798158

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
798158		QwertyPi	벽 (IOI14_wall)	C++14	100 / 100	605 ms	39956 KiB

wall

#include "wall.h"
#include <bits/stdc++.h>

using namespace std;
const int INF = 1 << 30;

struct range{
	int l, r;
	range operator+ (const range& o) const {
		if(r < o.l) return {o.l, o.l};
		if(l > o.r) return {o.r, o.r};
		return {max(o.l, l), min(o.r, r)};
	}
};

range t[1 << 21];
int k;
void build(int v = 0, int l = 0, int r = k - 1){
	if(l == r) return void(t[v] = {0, INF});
	int m = (l + r) / 2;
	build(v * 2 + 1, l, m); build(v * 2 + 2, m + 1, r);
	t[v] = t[v * 2 + 1] + t[v * 2 + 2];
}

void update(int p, int op, int h, int v = 0, int l = 0, int r = k - 1){
	if(l == r){
		if(op == 0) t[v] = {0, INF};
		else if(op == 1) t[v] = {h, INF};
		else t[v] = {0, h};
		return;
	}
	int m = (l + r) / 2;
	if(p <= m) update(p, op, h, v * 2 + 1, l, m);
	else update(p, op, h, v * 2 + 2, m + 1, r);
	t[v] = t[v * 2 + 1] + t[v * 2 + 2];
}

struct query{
	int t, p, op, h;
	bool operator< (const query& o) const {
		return t < o.t;
	}
};

void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
	::k = k;
	vector<query> Q;
	for(int i = 0; i < k; i++){
		Q.push_back({left[i], i, op[i], height[i]});
		Q.push_back({right[i] + 1, i, 0, height[i]});
	}
	build();
	sort(Q.begin(), Q.end());
	int qi = 0;
	for(int i = 0; i < n; i++){
		while(qi < Q.size() && Q[qi].t <= i) update(Q[qi].p, Q[qi].op, Q[qi].h), qi++;
		finalHeight[i] = t[0].l;
	}
	return;
}

컴파일 시 표준 에러 (stderr) 메시지

wall.cpp: In function 'void buildWall(int, int, int*, int*, int*, int*, int*)':
wall.cpp:56:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<query>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |   while(qi < Q.size() && Q[qi].t <= i) update(Q[qi].p, Q[qi].op, Q[qi].h), qi++;
      |         ~~~^~~~~~~~~~

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