#include<bits/stdc++.h> using namespace std; bool wh(int a,int b,int c,int d) { if(a-b-c-d>0) { return 1; } else { return 0; } } int main() { int n,sum=0; cin>>n; int a[n],p[n],q[n],r[n],s[n]; for(int i=0;i<n;i++) { cin>>a[i]; p[i]=a[i]/1000; q[i]=(a[i]-1000*p[i])/100; r[i]=(a[i]-1000*p[i]-100*q[i])/10; s[i]=(a[i]-1000*p[i]-100*q[i]-10*r[i])/1; if(wh(s[i],r[i],q[i],p[i])) { sum++; } } cout<<sum; return 0; }