Compilare: user.cpp: In function ‘int main()’: user.cpp:15:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==2&&y==-1) ^ user.cpp:6:26: warning: unused variable ‘j’ [-Wunused-variable] unsigned long long i,j,n,p,x,x1,y=-1,ok=1,tip; ^ user.cpp:6:47: warning: unused variable ‘tip’ [-Wunused-variable] unsigned long long i,j,n,p,x,x1,y=-1,ok=1,tip; ^ user.cpp:7:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld %lld",&n,&p); ^ user.cpp:12:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld",&x);//cout<<x1<<" "<<x<<endl; ^