C++ :

#include<bits/stdc++.h>
using namespace std;
double n[100005],x,z,ans;
int a;
int main(){
	while(cin>>x){
		n[a]=x;
		a=a+1;
		z=z+x;
	}
	z=z/a;
	for(int i=0;i<a;i++){
		if(n[i]<z)ans++;
	}
	cout<<ans;
}

Python :

# coding=utf-8
x = input () .split()
z = 0
j = 0
a = 0
for i in x:
    y = int (i)
    z += y
    j += 1
c = z/j
for i in x:
    y = int (i)
    if ( y < c ):
        a += 1
print (a)