Compilare: user.cpp: In function ‘void recurs(int, int)’: user.cpp:22:24: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if ( nr&(nr-1) == 0 ) ^ user.cpp:38:24: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if ( nr&(nr-1) == 0 ) ^ user.cpp: In function ‘int main()’: user.cpp:81:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "timp.in" , "r" , stdin ) ; ^ user.cpp:82:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "timp.out" , "w" , stdout ) ; ^ user.cpp:83:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d %d" , &n , &t ) ; ^