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"
std::vector<int> coin_flips(std::vector<int> b, int c) {
for (int i = 0; i < 64; ++i)
if (b[i]) c ^= i;
return {c};
}
int find_coin(std::vector<int> b) {
int c = 0;
for (int i = 0; i < 64; ++i)
if (b[i]) c ^= i;
return c;
}
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