#include <bits/stdc++.h> 
using namespace std;
int main()
{
    int n,x;
    cin >> n;
    x=n+n/100*1000+n/10%10*10000+n%10*100000;
    cout <<x;
    return 0;
}

代码

又过了

#include <bits/stdc++.h>
using namespace std;
int main()
{
    string s;
    cin >> s;
    cout << s[2] << s[1] << s[0] << s;
    return 0;
}

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int a,b;
    cin >> a;
    b=a+a/100*1000+a/10%10*10000+a%10*100000;
    cout <<b;
    return 0;
}

A

#include<bits/stdc++.h>
using namespace std;
string n;
int main()
{
    cin>>n;
    for(int i=2;i>=0;i--)
    {
        cout<<n[i];
    }
    cout<<n;
    return 0;
}
试试这个吧

using namespace std;
int main()
{
    int n,x;
    cin >> n;
    x=n+n/100*1000+n/10%10*10000+n%10*100000;
    cout <<x;
    return 0;
}

`#include using namespace std; int main() { int n,x; cin >> n; x=n+n/1001000+n/10%1010000+n%10*100000; cout <<x; return 0; }

少写

#include <bits/stdc++.h>😕