#include<iostream>
using namespace std;
int main()
{
long long n,k;
cin>>n>>k;
long long t=(n+1)/2;
if(k<=t)
cout<<2*k-1;
else
cout<<(k-t)*2;
return 0;
}
#include < bits / stdc ++. h > using namespace std ; int main () { long n ; string str ; cin >> n ; cin >> str ; long count = 0 , index ; index = str . find ( "A" ); while ( index !=- 1 ) { count ++; str . erase ( str . begin ()+ index , str . begin ()+ index + 1 ); index = str . find ( "A" ); } if ( count > n - count ) cout << "Anton" ; else if ( count < n - count ) cout << "Danik" ; else cout << "Friendship" ; return 0 ; }
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