go: add «1482. Minimum Number of Days to Make m Bouquets»

Signed-off-by: Matej Focko <me@mfocko.xyz>

go/minimum-number-of-days-to-make-m-bouquets.go

@@ -0,0 +1,43 @@
+package main
+
+func minDays(bloomDay []int, m int, k int) int {
+	getBouquets := func(day int) int {
+		bouquets := 0
+
+		count := 0
+		for i := range bloomDay {
+			if bloomDay[i] <= day {
+				count++
+			} else {
+				count = 0
+			}
+
+			if count == k {
+				bouquets++
+				count = 0
+			}
+		}
+
+		return bouquets
+	}
+
+	firstDay := 0
+	lastDay := 0
+	for _, day := range bloomDay {
+		lastDay = max(lastDay, day)
+	}
+
+	minDay := -1
+	for firstDay <= lastDay {
+		mid := (firstDay + lastDay) / 2
+
+		if getBouquets(mid) >= m {
+			minDay = mid
+			lastDay = mid - 1
+		} else {
+			firstDay = mid + 1
+		}
+	}
+
+	return minDay
+}