XDOJ_1008_水

Posted 2020-08-14

http://acm.xidian.edu.cn/problem.php?id=1008

 

约瑟夫环，小数据，水过。

 

#include<iostream>
#include<cstring>
#include<cstdio>
#include<algorithm>
using namespace std;

int n,k;
int nextt[200005],lastt[200005];

int main()
{
    scanf("%d%d",&n,&k);
    for(int i = 1;i < n;i++)    nextt[i] = i+1;
    for(int i = 2;i <= n;i++)    lastt[i] = i-1;
    nextt[n] = 1;
    lastt[1] = n;
    printf("%d",k);
    nextt[lastt[k]] = nextt[k];
    lastt[nextt[k]] = lastt[k];
    int cnt = n-1,now = nextt[k];
    while(cnt)
    {
        int left = (k-1)%cnt;
        while(left--)    now = nextt[now];
        printf(" %d",now);
        nextt[lastt[now]] = nextt[now];
        lastt[nextt[now]] = lastt[now];
        now = nextt[now];
        cnt--;
    }
    putchar(‘\n‘);
    return 0;
}