Codeforces Round #156 (Div. 2) A Greg's Workout

题目：http://codeforces.com/contest/255/problem/A

#include <iostream>
#include <cstdlib>
using namespace std;

int main()
{
    int n;
    int arr[25];
    int muscle[3]={0,0,0};
    cin >> n;
    for(int i=0;i<n;i++)
    {
        int temp;
        cin >> temp;
        muscle[i%3]+=temp;
    }
    int maxi=0,max=muscle[0];
    for(int i=0;i<3;i++)
    {
        if(muscle[i]>max) 
        {
            maxi=i;        
            max=muscle[i];
        }
    }
    if(maxi==0) cout << "chest" ;
    else if(maxi==1) cout << "biceps" ;
    else if(maxi==2) cout << "back" ;
    return 0;
}