Compilare: user.cpp: In function ‘int main()’: user.cpp:12:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while((1<<(n-1)) < x)n++; ^ user.cpp:16:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((x==1 && y>=1)||(x<=(1<<(n-1)) && (1<<(n-1))<=y)){com=1;gasit=1;break;} ^ user.cpp:16:58: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((x==1 && y>=1)||(x<=(1<<(n-1)) && (1<<(n-1))<=y)){com=1;gasit=1;break;} ^ user.cpp:19:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x<=t && t<=y){ ^ user.cpp:19:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x<=t && t<=y){ ^ user.cpp:4:32: warning: unused variable ‘con’ [-Wunused-variable] unsigned long long x,y,com,con,n,gasit=0; ^ user.cpp:6:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%llu %llu",&x,&y); ^