#include<iostream>
using namespace std;
int max(int a,int b)
{
    return a>b?a:b;
}
double max(double a,double b)
{
    return a>b?a:b;
}
char max(char a,char b)
{
    return a>b?a:b;
}
int main()
{
    int a,b;
    double x,y;
    char c1,c2;
    cin>>a>>b;
    cout<<"整数比较，最大值是 "<<max(a,b)<<endl;
    cin>>x>>y;
    cout<<"浮点数比较，最大值是 "<<max(x,y)<<endl;
    cin>>c1>>c2;
    cout<<"字符比较，最大值是 "<<max(c1,c2)<<endl;
    return 0;
}