제출 #650814

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
650814		kunzaZa183	Coins (IOI17_coins)	C++17	0 / 100	9 ms	1544 KiB

coins

#include <bits/stdc++.h>
using namespace std;
vector<int> coin_flips(vector<int> b, int c)
{
    int cur = 0;
    for (int i = 0; i < b.size(); i++)
        if (b[i] == 1)
            cur = cur ^ i;
    for (int i = 0; i < 64; i++)
        if (cur ^ i == c)
        {
            b[i] = !b[i];
            break;
        }
    return b;
}
int find_coin(vector<int> b)
{
    int cur = 0;
    for (int i = 0; i < b.size(); i++)
        if (b[i] == 1)
            cur = cur ^ i;
    return cur;
}

컴파일 시 표준 에러 (stderr) 메시지

coins.cpp: In function 'std::vector<int> coin_flips(std::vector<int>, int)':
coins.cpp:6:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    6 |     for (int i = 0; i < b.size(); i++)
      |                     ~~^~~~~~~~~~
coins.cpp:10:21: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
   10 |         if (cur ^ i == c)
      |                   ~~^~~~
coins.cpp: In function 'int find_coin(std::vector<int>)':
coins.cpp:20:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     for (int i = 0; i < b.size(); i++)
      |                     ~~^~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 15
• Subtask 3: 0 / 10
• Subtask 4: 0 / 15
• Subtask 5: 0 / 50