Minimum Number of Days to Make m Bouquets

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Solution Guide: Minimum Number of Days to Make m Bouquets

Approach

Binary search the number of days. For each day, count adjacent bloomed flowers in streaks and whether they form at least m bouquets of size k.

Complexity Analysis

Time
O(n log W) where W is bloom day range
Space
O(1)

Pattern

Binary Search on Answer

Why It Works

As days increase, feasibility is monotonic. If we can make bouquets by day d, we can also do so at any d+1.

Updated Feb 2026