#include <stdio.h> int main() { long long n, k; scanf("%I64d%I64d", &n, &k); long long even; if(n%2==0) even=n/2; else even=(n/2)+1; if(k<=even) printf("%I64d\n", 2*k-1); else printf("%I64d\n", 2*(k-even)); return 0; }
#include <stdio.h> int main() { long long n, k; scanf("%I64d%I64d", &n, &k); long long even; if(n%2==0) even=n/2; else even=(n/2)+1; if(k<=even) printf("%I64d\n", 2*k-1); else printf("%I64d\n", 2*(k-even)); return 0; }