WHY I AM GETTING WRONG ANSWER IN ATM?

#include
#include
using namespace std;
using std::setprecision;

int main()
{
int a;
float b;
cin>>a;
if(a>0)
{
cin>>b;
cout<<"\t";
if(b>0||b>0)
{
if(a%5==0)
{
if(b>a)
{
cout<<setprecision(2)<<(b-a-0.5);
}}
else
cout<<b;
}
}
return 0;
}

http://www.codechef.com/viewsolution/3492934 …this is ur corrected code…

//