UVA 11945 Financial Management (UVALive 2362, POJ 1004, ZOJ 1048, HDU 1064, Regionals 2001 >> North America - Mid-Atlantic USA

///     Raihan Ruhin
///     CSE, Jahangirnagar University.
///     Dhaka-Bangladesh.
///     id: raihanruhin (topcoder / codeforces / codechef / uva / uvalive), 3235 (lightoj)
///     mail: raihanruhin@ (yahoo / gmail / facebook)
///     blog: ruhinraihan.blogspot.com

#include<bits/stdc++.h>
using namespace std;

#define SET(a) memset(a,-1,sizeof(a))
#define CLR(a) memset(a,0,sizeof(a))
#define PI acos(-1.0)

#define MOD 1000000007
#define MX 100010


int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);
    int tc, kk=1, n, m, y, a, b, c;
    string s;
    double tot=0, x;
    for(int i=0;i<12;i++)
    {
        cin>>x;
        tot+=x;
    }
    cout<<"$"<<setprecision(2)<<fixed<<tot/12.0<<"\n";
return 0;
}