#include<iostream> #include<cstdio> #include<cstring> #include<cmath> using namespace std; int a[1001]; int w(int x,int y){ int ys=x%y; while(ys!=0){ x=y; y=ys; ys=x%y; } return y; } int main(){ int n,sum=0; cin>>n; for(int i=1;i<=n;i++){ cin>>a[i]; } for(int i=1;i<=n;i++){ for(int j=1;j<=n;j++){ if(a[i]<a[j]&&w(a[i],a[j])==1){ sum++; } } } cout<<sum; }