insert-interval solution

Author: byol-han

insert-interval/byol-han.js

@@ -0,0 +1,33 @@
+/**
+ * https://leetcode.com/problems/insert-interval/submissions/1678158074/
+ * @param {number[][]} intervals
+ * @param {number[]} newInterval
+ * @return {number[][]}
+ */
+var insert = function (intervals, newInterval) {
+  const result = [];
+  let i = 0;
+  const n = intervals.length;
+
+  // 1. newInterval보다 끝나는 시점이 먼저인 interval은 그냥 추가
+  while (i < n && intervals[i][1] < newInterval[0]) {
+    result.push(intervals[i]);
+    i++;
+  }
+
+  // 2. newInterval과 겹치는 interval은 병합
+  while (i < n && intervals[i][0] <= newInterval[1]) {
+    newInterval[0] = Math.min(newInterval[0], intervals[i][0]);
+    newInterval[1] = Math.max(newInterval[1], intervals[i][1]);
+    i++;
+  }
+  result.push(newInterval);
+
+  // 3. 나머지 interval은 그대로 추가
+  while (i < n) {
+    result.push(intervals[i]);
+    i++;
+  }
+
+  return result;
+};