Submission #1080228

#	Time	Username	Problem	Language	Result	Execution time	Memory
1080228		Mihailo	Coins (IOI17_coins)	C++14	100 / 100	6 ms	1940 KiB

coins

#include <bits/stdc++.h>
using namespace std;

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

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

Compilation message (stderr)

coins.cpp: In function 'std::vector<int> coin_flips(std::vector<int>, int)':
coins.cpp:7:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 |     for(int i=0; i<b.size(); i++) {
      |                  ~^~~~~~~~~
coins.cpp: In function 'int find_coin(std::vector<int>)':
coins.cpp:15:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |     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