coin change solution

Author: parkhojeong

coin-change/parkhojeong.py

@@ -0,0 +1,21 @@
+class Solution:
+    def coinChange(self, coins: List[int], amount: int) -> int:
+        if amount == 0:
+            return 0
+
+        dp = [1 if x in coins else 0 for x in range(amount + 1)]
+        MAX_VALUE = sys.maxsize
+
+        for i in range(1, amount + 1):
+            if dp[i] != 0:
+                continue
+
+            dp[i] = MAX_VALUE
+            for coin in coins:
+                if i - coin > 0 and dp[i - coin] > 0:
+                    dp[i] = min(dp[i - coin] + 1, dp[i])
+
+        if dp[amount] == MAX_VALUE:
+            return -1
+
+        return dp[amount]