Submission #991064

#	Time	Username	Problem	Language	Result	Execution time	Memory
991064		messiuuuuu	Coins (IOI17_coins)	C++14	100 / 100	8 ms	1948 KiB

coins

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

using namespace std;

std::vector<int> coin_flips(vector<int> b, int c) {
    int ans = 0;
    for (int i = 0; i < b.size(); i++)
        if (b[i])
            ans ^= i;
    vector<int> res = {ans ^ c};
    return res;
}

int find_coin(vector<int> b) {
    int ans = 0;
    for (int i = 0; i < b.size(); i++)
    {
        if (b[i])
            ans ^= i;
    }
    return ans;
}

Compilation message (stderr)

coins.cpp: In function 'std::vector<int> coin_flips(std::vector<int>, int)':
coins.cpp:8:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     for (int i = 0; i < b.size(); i++)
      |                     ~~^~~~~~~~~~
coins.cpp: In function 'int find_coin(std::vector<int>)':
coins.cpp:17:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |     for (int i = 0; i < b.size(); i++)
      |                     ~~^~~~~~~~~~

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