타겟 넘버 / 중급

Author: oh-chaeyeon

oh-chaeyeon/7주차_그래프/타켓_넘버.js

@@ -0,0 +1,18 @@
+function solution(numbers, target) {
+  const dp = new Map();
+  dp.set(0, 1);
+
+  for (const number of numbers) {
+    const nextDp = new Map();
+    for (const [sum, count] of dp) {
+      nextDp.set(sum + number, (nextDp.get(sum + number) || 0) + count);
+      nextDp.set(sum - number, (nextDp.get(sum - number) || 0) + count);
+    }
+    dp.clear();
+    for (const [sum, count] of nextDp) {
+      dp.set(sum, count);
+    }
+  }
+
+  return dp.get(target) || 0;
+}