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