POJ 1012 Joseph

水题痛彻我心扉，就这样。 

#include<iostream>
using namespace std;
int main()
{
    int a[14];
    int i,j,k,num = 2;
    while(num <= 13)
    {
        if(num == 0)
            break;
        for(i = 1;;i++)
        {
            j = 0;
            k = num * 2;
            while(1)
            {
                j = (j + i) % k;
                if(j == 0 || j > num)
                {
                    k--;
                    if(k == num)
                    {
                        a[num] = i;
                        goto end;
                    }
                    if(j == 0)
                        j = k;
                    else
                        j--;
                }
                else
                    break;
            }
        }
end:
        num++;
        continue;
    }//while
    int t;
    while(cin>>t)
    {
        if(t == 0)
            break;
        if(t == 1)
        {
            cout<<2<<endl;
            continue;
        }
        else
            cout<<a[t]<<endl;
    }
    return 0;
}