create dev channel

zeta/py/completed/10844.py

@@ -0,0 +1,20 @@
+N = int(input())
+
+Mem = [[0] * 10 for i in range(100)]
+
+
+def I(l, k):
+    if 0 <= k <= 9:
+        if l == 1:
+            return 1
+        elif Mem[l-1][k] != 0:
+            return Mem[l-1][k]
+        else:
+            temp = (I(l - 1, k - 1) + I(l - 1, k + 1)) % 1000000000
+            Mem[l-1][k] = temp
+            return temp
+    else:
+        return 0
+
+
+print(sum(I(N, i) for i in range(1, 10)) % 1000000000)