#include<bits/stdc++.h> using namespace std; int main() { int n; n = 10; int a[n]; for (int i = 0; i < n; i++) { cin >> a[i]; } int k; cin >> k; int c = 0; for (int j = 0; j < n; j++) { if (k+30>= a[j] ) { c++; } } cout << c; return 0; }