#include<bits/stdc++.h> using namespace std; int main(){ int n,m,num=0,g,s,b,q; cin>>n; for(int i = 1;i<= n;i++){ cin>>m; g = m % 10; s = m / 10 % 10; b = m / 100 % 10; q = m / 1000; if(g-s-b-q>0){ num+=1; } } cout<<num; return 0; }