Update 1889-minimum-space-wasted-from-packaging.js

Author: everthis

1889-minimum-space-wasted-from-packaging.js

@@ -1,3 +1,57 @@
+/**
+ * @param {number[]} packages
+ * @param {number[][]} boxes
+ * @return {number}
+ */
+const minWastedSpace = function (packages, boxes) {
+  const mod = 1e9 + 7
+  const n = packages.length
+  packages.sort((a, b) => a - b)
+  const preSum = packages.reduce(
+    (acc, cur) => {
+      acc.push(acc[acc.length - 1] + cur)
+      return acc
+    },
+    [0]
+  )
+
+  const upperBound = (target) => {
+    let lo = 0,
+      hi = n
+    while (lo < hi) {
+      const mi = (lo + hi) >> 1
+      const val = packages[mi]
+      if (val <= target) {
+        lo = mi + 1
+      } else {
+        hi = mi
+      }
+    }
+    return lo
+  }
+
+  let res = Infinity
+  for (const bs of boxes) {
+    bs.sort((a, b) => b - a)
+    if (bs[0] < packages[n - 1]) continue
+    let wastes = bs[0] * n - preSum[n]
+    let last = bs[0]
+    for (let i = 1; i < bs.length; i++) {
+      const b = bs[i]
+      const j = upperBound(b)
+      if (j <= 0) {
+        break
+      }
+      wastes -= (last - b) * j
+      last = b
+    }
+    res = Math.min(res, wastes)
+  }
+  return res === Infinity ? -1 : res % mod
+}
+
+// another
+
 /**
  * @param {number[]} packages
  * @param {number[][]} boxes