#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ char a[64]; double s=0,x=2; int e=a.find()-1; cin>>a; for(int i=e;i>=0;i--){ s+=(a[i]-'0')*pow(2,i) } for(int i=e+2;i>=0;i--){ s+=(a[i]-'0')*pow(5,i) } cout<<s; return 0; }