Delete Numbers


http://www.cnblogs.com/theskulls/p/5289192.html
有一个数组a[N]顺序存放0-N,要求没隔两个数删掉一个数,到末尾时循环至开头继续进行,求最后一个被删掉的数的原始下标位置。以8个数(N=7)为例:{0,1,2,3,4,5,6,7},0->1->2(删除)->3->4->5(删除)->6->7->0(删除),如此循环直到最后一个数被删除。
输入描述:
每组数据为一行一个整数n(小于等于1000),为数组成员数,如100,则对a[999]进行计算。
输出描述:
一行输出最后一个被删掉的数的原始下标位置。
输入例子:
8
输出例子:
6

    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        while(in.hasNext()){
            int n = in.nextInt();
            int id = -1;
            if(n<=1){
                break;
            }
             
            int[] A = new int[n];
            int flag = 0;// max 3
            int num = n;
            while(num>=1){
                id++;
                if(id ==n) id = 0;
                if(A[id] == 0){
                    flag++;   
                }
                if(flag == 3){
                    flag = 0;
                    A[id] = -1;
                    num--;
                }
                 
            }
            System.out.println(id);
             
        }
    }
http://m.blog.csdn.net/article/details?id=51690079
    public static void deleteNumber(int n){
     int index = 0;//保存元素下标
     int[] flag = new int[n];//标记数组中的元素是否已经被删除过     
     int inteval = 0;//记录间隔的元素个数,当inteval=3时候更新删除标记为flag
        int count_delete = 0;//统计删除的元素个数
     //总共删除n个元素
     while(count_delete < n){
      //当i=n时候,相当于从0继续循环遍历
      for(int i = 0 ; i != n ; i++){
       //当前数组元素i还没有被删除
       if(flag[i] == 0){
        inteval++;
        if(inteval == 3){
         flag[i] = 1;//更新删除标记位
         inteval = 0;//更新间隔元素个数
         index = i;//保存删除元素的下标
                        count_delete++;
        }
       }//endif out
      }//endfor
     }
     System.out.println(index);
    }

int deleteNum(int n){
    queue<int> que;
    for(int i=0;i<n;i++){
        que.push(i);
    }
    int count=0;
    while(que.size()!=1){
        if(count!=2){
            int a=que.front();
            que.pop();
            que.push(a);
            count++;
        }else{
            que.pop();
            count=0;
        }
    }
    return que.front();
}
http://blog.sina.com.cn/s/blog_71fdf1f00100lkuc.html
http://lib.csdn.net/article/c/40660
https://github.com/jiongdu/Algorithm

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