Compilare: user.cpp: In function ‘void raise(long long int, long long int)’: user.cpp:14:18: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(power & 1 == 1) ^ user.cpp: In function ‘int main()’: user.cpp:31:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("classictask.in", "r", stdin); ^ user.cpp:32:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("classictask.out", "w", stdout); ^ user.cpp:34:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %lld %lld", &a, &b, &c); ^