#include <bits/stdc++.h>
using namespace std;
int main(){
	int a,b;
	cin >> a >> b;
	if(a>b) cout << a;
	if(a<b) cout << b;
	return 0;
}

#include<iostream>
#include<algorithm>
using namespace std;
int x,y;
int main(){
    cin>>x>>y;
    cout<<max(x,y);
    return 0;
}

菜就多练

C++ :

#include<bits/stdc++.h>
using namespace std;

int main(){
	int a,b;
	cin>>a>>b;
	if(a<b) cout<<b;
	else cout<<a;
}

Python :

# coding=utf-8
x=int(input())
y=int(input())
if x>y :
    print(x)
else:
    print(y)