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