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

max（）函数秒掉

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

#include using namespace std; int main() { int a,b; cin>>a>>b; if(a>b){ cout<<a; } else{ cout<<b; } }