C :

#include<stdio.h>   

int main(){  
	int n;
	scanf("%d",&n);
	
	int b = n / 100;
	int s = n / 10 % 10;
	int g = n % 10;
	
	
	int c = g * 100 + s * 10 + b;
	printf("%d",c);

	return 0; 
} 

C++ :

#include <iostream>
using namespace std;
int main(){
	int n,a,b,c,x;
	cin>>n;
	a=n/100;
	b=n/10%10;
	c=n%10;
	x=c*100+b*10+a*1;
	cout<<x<<endl;
}

Python :

n=int(input())
a=n//100
b=n//10%10
c=n%10
S=c*100+b*10+a
print(S)