uva10137.cpp

//{ Template
//{ C-headers
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <cstring>
#include <climits>
#include <cfloat>
#include <cctype>
#include <cassert>
#include <ctime>
//}
//{ C++-headers
#include <iostream>
#include <iomanip>
#include <sstream>
#include <algorithm>
#include <utility>
#include <string>
#include <stack>
#include <queue>
#include <vector>
#include <set>
#include <map>

using namespace std;
//}

//}
//{ Floating-points
#define EPS DBL_EPSILON
#define abs(x) (((x) < 0) ? - (x) : (x))
#define zero(x) (abs (x) < EPS)
#define equal(a,b) (zero ((a) - (b)))
#define PI 2 * acos (0.0)
//}
#define max(a,b) (a)>(b)?(a):(b)
#define min(a,b) (a)<(b)?(a):(b)
#define memo(a,v) memset(a,v,sizeof(a))
#define all(a) a.begin(),a.end()
#define INF 1<<29
#define ll long long
#define db double
#define pii pair<int ,int >
#define NL puts("")
#define G getchar()
//}

//compute b^p
ll Pow(ll  b,ll  p){
    ll  ret = 1;
    while(p){
        if(p&1) ret *= b ;
        p >>= (1ll) , b *= b ;
    }
    return ret ;
}

//compute b^p%m
ll BigMod(ll  b,ll  p ,ll  m ){
     ll  ret = 1 ;
     while(p)  {
        if(p&1) ret = (ret * b ) % m ;
        p >>= (1ll) , b = (b*b)%m ;
     }
    return ret ;
}

//compute gcd of (a,b)
ll GCD(ll a , ll b){
    while(b) b ^=  a ^= b ^= a %= b ;
    return a;
}

//compute lcm of (a,b)
ll LCM(ll a , ll b) {
     return (a / GCD(a,b)*b);
}

double absolute(double x)
{
        if(x<0) return -x;
        return x;
}

int main () {
        int n,i;
        double sum,ans,arr[1000+10];

        while(scanf("%d",&n)&&n)
        {
                sum=0.0;
                for(i=0;i<n;i++) {
                        scanf("%lf",&arr[i]);
                        sum+=arr[i];
                }

                sum/=n;
                cout<<sum<<endl;
                ans=0.0;
                for(i=0;i<n;i++) {
                        if(arr[i]<sum)
                                ans=(double)(ans+absolute(sum-arr[i]));
                        cout<<absolute(sum-arr[i])<<"  lol"<<endl;
                }

                printf("%.2lf\n",ans);
        }
        return 0;
}