Submission #787814

#	Time	Username	Problem	Language	Result	Execution time	Memory
787814		borisAngelov	Coins (IOI17_coins)	C++17	100 / 100	8 ms	1552 KiB

coins

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

using namespace std;

vector<int> coin_flips(vector<int> b, int c)
{
    vector<int> result(1);

    int curr = c;

    for (int i = 0; i < b.size(); ++i)
    {
        if (b[i] != 0)
        {
            curr = (curr ^ i);
        }
    }

    result[0] = curr;
    return result;
}

int find_coin(vector<int> b)
{
    int ans = 0;

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

    return ans;
}

Compilation message (stderr)

coins.cpp: In function 'std::vector<int> coin_flips(std::vector<int>, int)':
coins.cpp:12:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for (int i = 0; i < b.size(); ++i)
      |                     ~~^~~~~~~~~~
coins.cpp: In function 'int find_coin(std::vector<int>)':
coins.cpp:28:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |     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