#include<cstdio>
#include<cmath>
using namespace std;
int main()
{	
	int m,a,b,c,A,B,C,n;
	scanf("%d",&m);
	a=m/100;
	b=m/10%10;
	c=m%10;
	if (a>c&&a>b)
	{
		A=a;
		if(b>c)
		{
			B=b;
			C=c;
		}
		else
		{
			B=c;
			C=b;
		}
	}
	if(b>c&&b>a)
	{
		A=b;
		if(a>c)
		{
			B=a;
			C=c;
		}
		else
		{
			B=c;
			C=b;
		}
	}
	else
	{
		A=c;
		if(a>b)
		{
			B=a;
			C=b;
		}
		else
		{
			B=b;
			C=a;
		}
	}
	n=100*A+10*B+C;
	printf("%d",n);
}