Submission #370674

#	Time	Username	Problem	Language	Result	Execution time	Memory
370674		TosakaUCW	Poklon (COCI17_poklon7)	C++17	96 / 120	1100 ms	181208 KiB

poklon

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

#pragma GCC optimize("-O3")

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];

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()
{
    n = read();
    for (int i = 1; i <= n; i++)
        L[i] = -read(), R[i] = -read();
    std::vector<char> ans = dfs(1);
    for (auto x : ans)
        printf("%c", x);
    return 0;
}

Compilation message (stderr)

poklon.cpp: In function 'std::vector<char> dfs(int)':
poklon.cpp:43:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |     for (int i = 0; i < a.size(); i++)
      |                     ~~^~~~~~~~~~

• Subtask 1: 96 / 120