# include<iostream> # include<cstdio> using namespace std; int main(){ /* double j=100; for(int i=1;i<=10;i++){ j=j/2; } printf("%.2lf",j); */ int j,a,g,h,k,l,s=0; cin>>j; for(int i=1;i<=j;i++){ cin>>a; g=a%10; h=a%100/10; k=a%1000/100; l=a/1000; if(g-h-k-l>0){ s=s+1; } } cout<<s; return 0; }