Compilare: user.cpp: In function ‘int main()’: user.cpp:28:32: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(a & (1LL << lg) > 0) ^ user.cpp:16:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&k,&m); ^ user.cpp:18:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&cost[i]); ^ user.cpp:21:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%lld %lld " ,&a,&b); ^