Submission #1123996

#	Time	Username	Problem	Language	Result	Execution time	Memory
1123996		3lektra	Coins (IOI17_coins)	C++20	Compilation error	0 ms	0 KiB

coins

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

int* coin_flips(int b[], int c){
    int y = 0;
    for(int i = 0; i < 64; ++i){
        y = y^(i*b[i]);
    }
    int a = y^c;
    cout << y << ' ' << a << '\n';

    if(b[a])b[a] = 0;
    else b[a] = 1;

return b;
}

int find_coins(int b[]){
    int c;
    for(int i = 0; i < 64; ++i){
        c = c^(i*b[i]);
    }

    return c;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccJBylR2.o: in function `main':
grader.cpp:(.text.startup+0x3e2): undefined reference to `coin_flips(std::vector<int, std::allocator<int> >, int)'
/usr/bin/ld: grader.cpp:(.text.startup+0xb8a): undefined reference to `find_coin(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status