#include <iostream> using namespace std; int main(){ int n,m,a,b,c,d,sum=0; cin>>m; for(int i=1;i<=n;i++){ cin>>m; a = m%10; b = m%10%10; d = m/1000%10; c = m/100%10; if(a-b-c-d>0){ sum++; } } cout<<sum; }