C :

#include<stdio.h>
int main()
{
	int a;
	scanf("%d",&a);
	printf("%.2f",(a+a/100+a%100)*1.0/3);
	return 0;
}

C++ :

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n;
	cin>>n;
	cout<<fixed<<setprecision(2)<<(n+n/100+n%100)/3.0;
}

Java :

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int x = sc.nextInt();
		int s = x / 100 ;
		int g = x % 100;
		double sum = (double)(x + s + g) / 3;
		System.out.println(String.format("%.2f", sum));
	}
}

Python :

n=int(input())
a=n//1000
b=n//100%10
c=n//10%10
d=n%10
print("%.2f"%((n+(a*10+b)+(c*10+d))/3))