해시

dnacu · dnacu · commit 5c7a90eee725 · 2020-09-08T17:34:05.000+09:00
diff --git a/PROGRAMMERS/해시/위장.js b/PROGRAMMERS/해시/위장.js
@@ -0,0 +1,14 @@
+function solution(clothes) {
+  const cmap = new Map();
+  clothes.forEach((c) => {
+    const [name, category] = c;
+    cmap.set(category, (cmap.get(category) || 0) + 1);
+  });
+
+  // 전체 경우의 수 = (상의갯수+1) * (모자갯수+1) ... - 1(아무것도 선택되지 않았을 때)
+  return (
+    [...cmap.values()].reduce((acc, cur) => {
+      return acc * (cur + 1);
+    }, 1) - 1
+  );
+}
