README.md

@@ -5,3 +5,11 @@
 * Completed in: 2 days, 19 hrs, 36 mins, 16 secs.
 * Reference
   * L26.6 Absorption Probabilities, MIT OpenCourseWare, https://www.youtube.com/watch?v=vEsUsaK1HBk
+
+### the-grandest-staircase-of-them-all
+* Completed in: 16 hrs, 38 mins, 52 secs.
+* DP
+
+### bomb-baby
+* Completed in: 1 hr, 46 mins, 55 secs.
+* GCD

level3/bomb-baby/solution.py

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+def solution(x, y):
+    return gcd(int(x), int(y))
+
+def gcd(x, y):
+    count = 0
+    while y != 0:
+        t = x % y
+        count += x//y
+        x, y = y, t
+    if x != 1:
+        return 'impossible'
+    return str(count-1)
+
+tests=[
+        [['4', '7'], '4'],
+        [['2', '1'], '1'],
+        [['2', '4'], 'impossible'],
+        ]
+
+for test in tests:
+    result = solution(*test[0])
+    print(test[0][0], test[0][1], result == test[1], result, test[1])
+    print ''

recruitme.txt

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