solve: coin change

Author: tolluset

coin-change/tolluset.ts

@@ -0,0 +1,22 @@
+/*
+ * TC: O(amount * coins.length)
+ * SC: O(amount)
+ * */
+function coinChange(coins: number[], amount: number): number {
+  if (amount === 0) {
+    return 0;
+  }
+
+  const dp = new Array(amount + 1).fill(Infinity);
+  dp[0] = 0;
+
+  for (let i = 1; i <= amount; i++) {
+    coins.forEach((coin) => {
+      if (coin <= i) {
+        dp[i] = Math.min(dp[i], dp[i - coin] + 1);
+      }
+    });
+  }
+
+  return dp[amount] === Infinity ? -1 : dp[amount];
+}