318A.Even&Odd added

Author: shuvookd

318A.Even&Odds.cpp

@@ -0,0 +1,22 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+int main()
+{
+    long long int n, k, step;
+    cin>> n>> k;
+    if(n % 2 == 0){
+        step = n / 2;
+    }
+    else{
+        step = (n + 1) / 2;
+    }
+    if(k <= step){
+        cout<< (k * 2) - 1;
+    }
+    else
+        cout<< (k - step) * 2;
+
+
+return 0;
+}