Compilare: user.cpp: In function ‘void solve()’: user.cpp:73:26: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if ((k >> j) & 1 == 1) ^ user.cpp: In function ‘int main()’: user.cpp:86:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cumpanit.in" ,"r", stdin); ^ user.cpp:87:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cumpanit.out" ,"w", stdout); ^ user.cpp:89:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %lld", &a, &b); ^