#import<iostream>
int n,a;int main(){std::cin>>n;for(;n;n--)a+=n%10==3|n/10%10==3|n/100%10==3;std::cout<<a;}

print(sum('3'in str(i+1)for i in range(int(input()))))

#import<iostream>
int a,b,k,s;main(){std::cin>>a>>b>>k;while(a<=b)s+=a*(a%k==0),a++;std::cout<<s;}

a,b,k=map(int,input().split());print(sum(range(a-1+k-(a-1)%k,b+1,k)))

#import<iostream>
int n,s,i,j;main(){std::cin>>n;int a[n];for(int&i:a){std::cin>>i;for(int&j:a)if(&j<&i)s+=j>2*i;}std::cout<<s;}

n,a,s=int(input()),[0]*1001,0
for x in map(int,input().split()):s+=sum(a[2*x+1:]);a[x]+=1
print(s)

#import<bits/stdc++.h>
int n,x,c[25];main(){std::cin>>n;while(n--)std::cin>>x,c[24-x/100]++;std::cout<<25-(std::max_element(c,c+25)-c);}

l=[0]*21;exec("l[int(input())//100]+=1;"*int(input()));print(21-l[::-1].index(max(l)))

#import<bits/stdc++.h>
using namespace std;
main(){int n,m;cin >> n;tuple<int,int,int>a[n];for(auto&[x,y,z]:a){cin>>m;z=m;while(m)x+=m%10,y=m%10,m/=10;}sort(a,a+n);for(auto&[x,y,z]:a)cout<<z<<" ";}

input();print(*sorted(input().split(),key=lambda x:(sum(map(int,x)),x[0],int(x))))

#import<bits/stdc++.h>
main(){int n;std::cin>>n;std::tuple<int,int,int>a[n];for(auto&[y,m,d]:a)scanf("%d/%d/%d",&d,&m,&y);std::sort(a,a+n);for(auto[y,m,d]:a)printf("%02d/%02d/%04d\n",d,m,y);}

print('\n'.join(sorted([input()for _ in range(int(input()))],key=lambda x:x.split('/')[::-1])))

#import<iostream>
using namespace std;main(){int n,i=1;cin>>n;while(++i<n)if(n%i<1){cout<<i<<" "<<n/i;i+=n/i;while(i++<n)cout<<" 1";exit(0);}cout<<"-1";}

n=int(input())
for i in range(2,n):if n%i<1:n//=i;print(i,n,*[1]*(i*n-n-i));exit(0)
print(-1)