原题链接:出圈
解题思路:
典型的约瑟夫环题
注意事项:
用C提交时就行了#include <cstdlib>
但是用C++提交需要#include <malloc.h>
说好的C++完全兼容C呢,,还是说这个OJ编译器的版本问题
参考代码:
#include <stdio.h>
#include <cstdlib>
#include <malloc.h>
struct Joseph {//约瑟夫环
int number;
struct Joseph *next;
};
struct Joseph *Create(int);//建立环链
void Out(struct Joseph *, int);//输出
struct Joseph *Delete(struct Joseph *, struct Joseph *);//删除节点
int main() {
int m, n;
struct Joseph *head = NULL;
while (scanf("%d %d", &m, &n) != EOF) {
head = Create(m);//建立环链
Out(head, n);//输出
}
return 0;
}
struct Joseph *Create(int m) {//建立环链
struct Joseph *head = NULL, *p = NULL, *q = NULL;
p = (struct Joseph *) malloc(sizeof(struct Joseph));
if (p == NULL) {
printf("内存分配出错\n");
exit(0);
} else
head = q = p;
p->number = 1;
for (int i = 2; i <= m; i++) {
p = (struct Joseph *) malloc(sizeof(struct Joseph));
if (p == NULL) {
printf("内存分配出错\n");
exit(0);
}
q->next = p;
p->number = i;
q = p;
}
q->next = head;
return head;
}
void Out(struct Joseph *p, int n) {
struct Joseph *q = NULL;
while (p != p->next) {
for (int i = 1; i < n; i++) {
q = p;
p = p->next;
}
p = Delete(p, q);//删除节点
}
printf("%d\n", p->number);
free(p);
}
struct Joseph *Delete(struct Joseph *p, struct Joseph *q) {
q->next = p->next;
free(p);
return q->next;
}0.0分
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