#include "coins.h"
std::vector<int> coin_flips(std::vector<int> b, int c) {
std::vector<int> flips(1);
int xr = 0;
for (int i = 0; i < 64; i++)
xr ^= b[i];
flips[0] = c - xr;
return flips;
}
int find_coin(std::vector<int> b) {
int xr = 0;
for (int i = 0; i < 64; i++)
xr ^= b[i];
return xr;
}
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