/*
*/
 
//#pragma comment(linker, "/STACK:16777216")
#include <fstream>
#include <iostream>
#include <string>
#include <complex>
#include <math.h>
#include <set>
#include <vector>
#include <map>
#include <queue>
#include <stdio.h>
#include <stack>
#include <algorithm>
#include <list>
#include <ctime>
#include <memory.h>
#include <ctime> 
 
#define y0 sdkfaslhagaklsldk
#define y1 aasdfasdfasdf
#define yn askfhwqriuperikldjk
#define j1 assdgsdgasghsf
#define tm sdfjahlfasfh
#define lr asgasgash
 
#define eps 1e-9
//#define M_PI 3.141592653589793
#define bs 2717401869ll
#define bsize 256
#define right adsgasgadsg
#define free adsgasdg
#define MAG 10000

using namespace std;

string st;
set<string> ans;
string tst;

int main(){
//freopen("evacuation.in","r",stdin);
//freopen("evacuation.out","w",stdout);
//freopen("C:/input.txt","r",stdin);
//freopen("C:/output.txt","w",stdout);
ios_base::sync_with_stdio(0);
//cin.tie(0);

cin>>st;
for (int i=0;i<=st.size();i++)
 for (int ad='0';ad<='9';ad++)
 {
  tst="";
  for (int q=0;q<i;q++)
   tst+=st[q];
  tst+=ad;
  for (int q=i;q<st.size();q++)
   tst+=st[q];
  if (tst[0]!='0'||tst[1]!='7') continue;
  ans.insert(tst);
 }
cout<<ans.size()<<endl;

cin.get();cin.get();
return 0;}