create dev channel

zeta/py/completed/1074.py

@@ -0,0 +1,10 @@
+N, r, c = map(int, input().split())
+
+Z = lambda r, c: r * 2 + c
+
+S = 0
+
+for i in range(N - 1, -1, -1):
+    S += (4 ** i) * Z(r // (2 ** i), c // (2 ** i))
+    r, c = r % (2 ** i), c % (2 ** i)
+print(S)