제출 #370679

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
370679		TosakaUCW	Poklon (COCI17_poklon7)	C++17	96 / 120	1106 ms	166076 KiB

poklon

#include <stdio.h>
#include <algorithm>
#include <vector>
#include <iostream>

const int N = 1e6 + 5;

int n;
int L[N], R[N];

void convert(std::vector<char> &res, int x)
{
    for (; x; x /= 2)
        res.push_back(x % 2 ? '1' : '0');
    std::reverse(res.begin(), res.end());
}

std::vector<char> dfs(int v)
{
    std::vector<char> a, b;
	if (L[v] < 0)
		a = dfs(-L[v]);
	else
		convert(a, L[v]);
	if (R[v] < 0)
		b = dfs(-R[v]);
	else
		convert(b, R[v]);
    if (a.size() < b.size())
        swap(a, b);
    if (a.size() ^ b.size())
        return a.push_back('0'), a;
    for (int i = 0; i < a.size(); i++)
        if (a[i] ^ b[i])
        {
            if (b[i] == '1')
                std::swap(a, b);
            break;
        }
    return a.push_back('0'), a;
}

int main()
{
	std::ios_base::sync_with_stdio(0); 
	std::istream::sync_with_stdio(0); 
	std::cin.tie(0); std::cout.tie(0);
    std::cin >> n;
    for (int i = 1; i <= n; i++)
    {
		std::cin >> L[i] >> R[i];
		L[i] = -L[i], R[i] = -R[i];
	}
    std::vector<char> ans = dfs(1);
    for (auto x : ans)
        std::cout << x;
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

poklon.cpp: In function 'std::vector<char> dfs(int)':
poklon.cpp:33:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     for (int i = 0; i < a.size(); i++)
      |                     ~~^~~~~~~~~~

• Subtask 1: 96 / 120