#include<bits/stdc++.h>
using namespace std;

int main(){
	cin.tie(0),ios::sync_with_stdio(false);
	int ans=0;
	for(int i=1,n;i<=12;++i){
		if(i==2)n=28;
		else if(i<8&&i%2==1||i>=8&&i%2==0)n=31;
		else n=30;
		for(int j=1,t,t2;j<=n;++j){
			t=j;
			while(t){
				t2=t%10;
				t/=10;
			}
			if(t2==i)++ans;
		}
	}
	cout<<ans<<"\n"s;
}