#include <iostream>
using namespace std;
int main()
{
int gread;
cout<<"enter your gread";
cin>>gread;
if(gread>95){
cout<< "A+";
}
else if (gread>90){
cout<<"A";
}
else if (gread>85){
cout<< "B+";
}
else if (gread>80){
cout<< "B";
}
else if (gread>75){
cout<<"C+";
}
else if (gread>70){
cout<<"C";
}
else if(gread>65){
cout<<"D+";
}
else if(gread>=60){
cout<<"D";
}
else {
cout<<"F" ;
}
return 0;
}
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