Create 1335-minimum-difficulty-of-a-job-schedule.js

Author: everthis

1335-minimum-difficulty-of-a-job-schedule.js

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+/**
+ * @param {number[]} jobDifficulty
+ * @param {number} d
+ * @return {number}
+ */
+const minDifficulty = function (jobDifficulty, d) {
+  if (jobDifficulty.length < d) return -1
+  const cache = {}
+  const dfs = (start, numDays) => {
+    if (numDays === d) {
+      return start === jobDifficulty.length ? 0 : Infinity
+    }
+    const key = `${start}-${numDays}`
+    if (cache[key] !== undefined) return cache[key]
+    const end = jobDifficulty.length - d + numDays
+    let result = Infinity
+    let max = -Infinity
+    for (let i = start; i <= end; i++) {
+      max = Math.max(max, jobDifficulty[i])
+      result = Math.min(result, max + dfs(i + 1, numDays + 1))
+    }
+    return (cache[key] = result)
+  }
+  return dfs(0, 0)
+}