poj1012 235ms Joseph

#include<cstdio>
using namespace std;
//Joseph问题
//大概思路可以理解了，要整理一下
int main()
{
    int k;
    int ans[15] = {0};
    ans[1] = 2;
    while(scanf("%d",&k),k)
    {
        if(ans[k]>0)
        {
            printf("%d\n",ans[k]);
            continue;
        }
        int n = 2*k;
        for(int m = k+1;; ++m)
        {
            bool f = true;
            int s = 0;
            for(int i = 0; i<k; ++i)
            {
                s = (s+m)%(n-i);
                if(s<k)
                {
                    f = false;
                    break;
                }
            }
            if(f)
            {
                printf("%d\n",m+1);
                ans[k] = m+1;
                break;
            }
        }
    }
    return 0;
}