feat: 0875.Koko-Eating-Bananas

Leetcode_labuladong/875.爱吃香蕉的珂珂.go

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+// 時間複雜度:
+// 空間複雜度:
+/*
+ * @lc app=leetcode.cn id=875 lang=golang
+ *
+ * [875] 爱吃香蕉的珂珂
+ */
+
+// @lc code=start
+func minEatingSpeed(piles []int, h int) int {
+	// 找出最大的香蕉堆
+	left, right := 1, maxPile(piles)
+	for left < right {
+		// mid 代表消耗香蕉的速度(k)
+		mid := int(uint(left+right) >> 1)
+		if executeTime(piles, mid) <= h {
+			right = mid
+		} else {
+			left = mid + 1
+		}
+	}
+	return left
+}
+
+// 假設消耗速度k, 算出要花多少時間
+func executeTime(piles []int, k int) int {
+	time := 0
+	for _, pile := range piles {
+		time += pile / k
+		if pile%k > 0 {
+			time++
+		}
+		// time += int(math.Ceil(float64(pile) / float64(k)))
+	}
+	return time
+}
+
+func maxPile(piles []int) int {
+	result := 0
+	for _, pile := range piles {
+		if result < pile {
+			result = pile
+		}
+	}
+	return result
+}
+
+// @lc code=end
+