제출 #370672

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
370672		TosakaUCW	Poklon (COCI17_poklon7)	C++17	0 / 120	87 ms	8172 KiB

poklon

#include <stdio.h>
#include <algorithm>
#include <vector>
 
int read(int x = 0, int f = 0, char ch = getchar())
{
    while ('0' > ch or ch > '9')
        f = ch == '-', ch = getchar();
    while ('0' <= ch and ch <= '9')
        x = x * 10 + (ch ^ 48), ch = getchar();
    return f ? -x : x;
}
 
const int N = 1e6 + 5;
 
int n;
int L[N], R[N];
 
std::vector<int> convert(int x)
{
    std::vector<int> res;
    for (; x; x /= 2)
        res.push_back(x % 2);
    return std::reverse(res.begin(), res.end()), res;
}
 
std::vector<int> dfs(int v)
{
    std::vector<int> a, b;
    a = L[v] > 0 ? dfs(L[v]) : convert(-L[v]);
    b = R[v] > 0 ? dfs(R[v]) : convert(-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()
{
    n = read();
    for (int i = 1; i <= n; i++)
        L[i] = read(), R[i] = read();
    std::vector<int> ans = dfs(-1);
    for (auto x : ans)
        printf("%d", x);
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

poklon.cpp: In function 'std::vector<int> dfs(int)':
poklon.cpp:36:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |     for (int i = 0; i < a.size(); i++)
      |                     ~~^~~~~~~~~~

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