#include 
int main(){
int n,i,petki=0;
scanf("%d", &n);
int c1,c2,c3,c4;
int k;
float p;



c1=n/1000;
c2=(n/100)%10;
c3=(n/10)%10;
c4=n%10;



    if(c1==5)
    petki++;
     if(c2==5)
    petki++;
     if(c3==5)
    petki++;
     if(c4==5)
    petki++;




if(c1==5){
    c1+=1;}
if(c2==5){
    c2+=1;}
if(c3==5){
    c3+=1;}
if(c4==5){
    c4+=1;}



k=((c1*1000)+(c2*100)+(c3*10)+c4);



if(n>k){
    p=((100.0*(n-k))/k);
}
if(n