/*** 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可** * @param n int整型 * @param m int整型 * @return int整型*/struct ListNode * BuyNode(int n)//创建节点和成环{ struct ListNode  *phead=NULL;struct ListNode  *ptail=NULL;int N=1;while(n--){  struct ListNode *newnode=(struct ListNode *)malloc(sizeof(struct ListNode));newnode->val=N++;newnode->next=NULL;if(phead==NULL){phead=ptail=newnode;}else{ptail->next=newnode;ptail=newnode;}}ptail->next=phead;return ptail;//返回尾节点}int ysf(int n, int m ) {// write code hereif(n == 1){return n;}struct ListNode * tail = BuyNode(n);struct ListNode * cur = tail->next;int N = 1;while(cur->next != cur){if(N == m){tail->next = cur->next;cur = tail->next;N = 1;}N++;cur = cur->next;tail = tail->next;      }return cur->val;
}