# include<iostream> using namespace std; int main() { int n,a,b,c,d,m,count = 0; cin>>n; for(int i = 0; i < n; i++) { cin>>m; a = m/1000; b = (m - a)/100; c = (m - a - b)/10; d = m - a - b - c; if(d-a-b-c>0) count++; } cout<<count; }