This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "coins.h"
#include<bits/stdc++.h>
using namespace std;
vector<int> coin_flips(std::vector<int> b, int c) {
int res = 0;
for(int i = 0 ; i < 64 ; ++i)if(b[i])res ^= i;
return vector<int>(1 , res ^ c);
}
int find_coin(std::vector<int> b) {
int res = 0;
for(int i = 0 ; i < 64 ; ++i)if(b[i])res ^= i;
return res;
}
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