思路

看样例的话,是不是可能偶数没用了??

然后考虑奇数的话,照着样例模拟模拟试试??

反正我打的vp,,不会掉分哒!

随便打了个代码结果AC了233

#include <bits/stdc++.h>
#define maxn 200010
using namespace std ;
int n , a[maxn] ;
int main () {
   cin >> n ;
   if(n %2 == 0) {
       cout << "NO\n" ;
       return 0 ;
   }else {
       puts("YES") ;
       int tot = 0 ,lop = 1 ;
       while(++tot != n+n+1) {
//          cout << lop << " *" ;
           a[lop] = tot ;
           if(tot%2 == 1) {
               if(lop <= n) {
                   lop += n ;
               }else {
                   lop -= n ;
               }
           }else {
               lop += 1 ;
           }
       }
       for(int i = 1 ; i <= n+n;i ++) {
           cout << a[i] << " " ;
       }
   }
   return 0 ;
}

溜了溜了

CF1206C Almost Equal

原文：https://www.cnblogs.com/lyt020321/p/11393447.html