void main()
{
int n,i,a,b,c,d,e,s,f,g,h;
scanf("%d",&n);
a=n/10000;
b=(n-10000*a)/1000;
c=(n-10000*a-1000*b)/100;
d=(n-10000*a-1000*b-100*c)/10;
e=n-10000*a-1000*b-100*c-10*d;
f=n/1000;
g=n/100;
h=n/10;
if(h==0)
s=n;
else if(g==0)
s=10*e+d;
else if(f==0)
s=100*e+10*d+c;
else if(a==0)
s=1000*e+100*d+10*c+b;
else
s=10000*e+1000*d+100*c+10*b+a;

printf("%d",s);
}