/** libraries */
#include <iostream>
#include <cmath>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <algorithm>
/** libraries */
using namespace std;
/** defines */
#define ll long long
#define ld long double
#define yes cout << "YES" << "\n"
#define no cout << "NO" << "\n"
/** defines */
int a[20];
void solve(){
ld sum = 0;
for(auto i: a)
sum += i;
ld av = sum / 20;
int res = 0;
for(auto i: a)
if(i < av)
res++;
cout << res;
}
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
for(int i = 0; i < 20; i++)
cin >> a[i];
solve();
}
