#include "bits/stdc++.h"
using namespace std;
int num[100005],a,c,n;
double b;
long long max(double x,int y){
	return x>y?x:y;
}
int main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>num[i];
	}
	for(int i=1;i<=n;i++){
		a+=(abs(num[i]));
		b+=(1.0*abs(num[i])*abs(num[i]));
		c=max(c,abs(num[i]));
	}
	printf("%d\n%.15lf\n%d\n",a,sqrt(b),c);
	
return 0;
}