coin-change solution

Author: sejineer

coin-change/sejineer.py

@@ -0,0 +1,20 @@
+from collections import deque
+
+class Solution:
+    def coinChange(self, coins: List[int], amount: int) -> int:
+        queue = deque([(0, 0)])
+        vis = set()
+
+        while queue:
+            total, count = queue.popleft()
+            if total == amount:
+                return count
+            for coin in coins:
+                nxt = total + coin
+                if nxt > amount:
+                    continue
+                if nxt in vis:
+                    continue
+                vis.add(nxt)
+                queue.append((nxt, count + 1))
+        return -1