Compilare: user.cpp: In function ‘int main()’: user.cpp:31:34: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] while ( i & (1 << k) == 0 ) { ^ user.cpp:15:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &n, &s ); ^ user.cpp:17:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &v[ i ] ); ^