BZOJ1432: [ZJOI2009]Function

规律题，这规律无力吐槽了…

 1 /**************************************************************

 2     Problem: 1432

 3     User: zhuohan123

 4     Language: C++

 5     Result: Accepted

 6     Time:0 ms

 7     Memory:804 kb

 8 ****************************************************************/

 9  

10 #include <cstdio>

11 using namespace std;

12 inline int imin(int a,int b){return a<b?a:b;}

13 int main(int argc, char *argv[])

14 {

15     int n,k;scanf("%d%d",&n,&k);

16     printf("%d\n",n==1?1:2*imin(k,n-k+1));

17     return 0;

18 }