#include<bits/stdc++.h> using namespace std; int main() { int n; cin >> n; vector<int> mu(n,0); for(int i=0;i<n;i++) { cin >> mu[i]; } int res=0,min_pos; for(int i= n-2;i>=0;i--) { int left = mu[i],right=mu[i+1]; if(left>right) { int chu = left / right; int yu = left % right; if(yu>0) { res += chu; mu[i] = mu[i] / (chu+1); } else { res += chu-1; mu[i] = mu[i] / chu; } } } cout<< res << endl; return 0; }