coin change bfs 풀이

Author: highballplz

coin-change/highball.js

@@ -0,0 +1,48 @@
+const coinChange = function (coins, target) {
+  if (target === 0) return 0;
+
+  let level = 0;
+  let found = false;
+
+  let queue = [...coins];
+  let visit = new Set(coins);
+
+  while (queue.length > 0) {
+    level++;
+
+    const queueLength = queue.length;
+    for (let i = 0; i < queueLength; i++) {
+      const sum = queue.shift();
+
+      if (sum === target) {
+        found = true;
+        break;
+      }
+
+      for (let j = 0; j < coins.length; j++) {
+        if (sum + coins[j] > target || visit.has(sum + coins[j])) continue;
+        queue.push(sum + coins[j]);
+        visit.add(sum + coins[j]);
+      }
+    }
+
+    if (found) break;
+  }
+
+  if (found) return level;
+  else return -1;
+};
+
+console.log(coinChange([1, 2, 5], 11)); //3
+console.log(coinChange([2], 3)); //-1
+console.log(coinChange([1], 0)); //0
+
+console.log(coinChange([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12], 40)); //4
+
+console.log(coinChange([186, 419, 83, 408], 6249)); //20
+
+console.log(
+  coinChange([411, 412, 413, 414, 415, 416, 417, 418, 419, 420, 421, 422], 9864)
+); //24
+
+console.log(coinChange([1, 2], 3)); //2