#include<iostream.h>
#include<conio.h>
main()
{
int a,b;
if(a>75||b<100)
{
cout<<"grade is 'A'"<<"\n";
}
else if(a>50||b<75)
{
cout<<"grade is 'B'"<<"\n";
}
else
{
cout<<"grade is 'C'"<<"\n";
}
getch();
}