Problems
Exchange of numbers 3
include<bits/stdc++.h>
using namespace std;
int main() {
long a;
cin >> a;
if (a >= 1000) {
cout << a / 1000 << a / 10 % 10 << a / 100 % 10 << a % 10;
}
else {
cout << a / 10 % 10 << a / 100 % 10 << a % 10;
}
}
//TECHNOBLADE NEVER DIES