Submission #864480

#	Time	Username	Problem	Language	Result	Execution time	Memory
864480		dukkun	Coins (IOI17_coins)	C++14	0 / 100	6 ms	1368 KiB

coins

#include "coins.h"

std::vector<int> coin_flips(std::vector<int> b, int c) {
    std::vector<int> flips(1);
    int x = c;
    for (int i = 0 ; i < b.size() ; i++) {
        if (b[i] == 1) {
            x ^= i;
        }
    }
    flips[0] = x;
    return flips;
}

int find_coin(std::vector<int> b) {
    
    int ret = 0;

    for (int &u: b) {
        ret ^= u;
    }

    return ret;
}

Compilation message (stderr)

coins.cpp: In function 'std::vector<int> coin_flips(std::vector<int>, int)':
coins.cpp:6:24: 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++) {
      |                      ~~^~~~~~~~~~

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