POJ 3617 Best Cow Line(贪心)

#include <iostream>
#include <stdio.h>
#include <string.h>
using namespace std;
int main()
{
    char cow[2005];
    char New[2005];
    int n;
    while(cin>>n)
    {
        getchar();
        for(int i=0;i<n;i++)
        {
            cin>>cow[i];
            getchar();
        }
        /*for(int i=0;i<n;i++)
            cout<<cow[i];
            cout<<endl;*/
        int len=0;
        int head=0,tail=n;
        while(head!=tail)
        {
            /*cout<<head<<" "<<tail<<endl;
            cout<<cow[head]<<" "<<cow[tail-1]<<endl;
            getchar();*/
            if(cow[head]>cow[tail-1])
            {
                New[len]=cow[--tail];
            }
            else if(cow[head]<cow[tail-1])
                New[len]=cow[head++];
            else
            {
                    int a=head,b=tail-1;
                    while(a!=b)
                    {
                        if(cow[a]>cow[b])
                        {
                            New[len]=cow[--tail];
                            break;
                        }
                        else if(cow[a]<cow[b])
                        {
                            New[len]=cow[head++];
                            break;
                        }
                        else
                        {
                            if(a==b-1)
                            {
                                New[len]=cow[head++];
                                break;
                            }
                            a++;
                            b--;
                        }
                    }
                    if(a==b)
                    New[len]=cow[head++];
            }
            len++;
        }
        for(int i=0;i<n;i++)
        {
            cout<<New[i];
            if((i+1)%80==0)
            cout<<endl;
        }
        cout<<endl;
    }
    return 0;
}