#include<iostream> using namespace std; int main(){ int n; cin>>n; int i; int g; int q=0; for(i=1;i<=n;i++){ cin>>g; int ge=g%10; int shi=g/10%10; int bai=g/100%10; int qian=g/1000; if((ge-shi-bai-qian)>0) q++; } cout<<q; return 0; }