#include<iostream>
#include<cstdio>
using namespace std;
int n,ave=0,step=0;
int i,j; 
int a[110];
int main(){
	freopen("jfzp.in","r",stdin);
	freopen("jfzp.out","w",stdout);
	scanf("%d",&n);
	for(i=1;i<=n;i++){
		scanf("%d",&a[i]);
		ave+=a[i];
	}
	ave/=n;
	for(i=1;i<=n;i++) a[i]-=ave;
	i=1;j=n;
	while(a[i]==0&&i<n) i++;
	while(a[j]==0&&j>1) j--;
	while(i<j){
		a[i+1]+=a[i];
		a[i]=0;
		step++;
		i++;
		while(a[i]==0&&i<j) i++;
	}
	printf("%d",step);
	fclose(stdin);
	fclose(stdout);
	return 0;
}