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Jump Game II

You are given a 0-indexed array of integers nums of length n.

You are given a 0-indexed array of integers nums of length n. You are initially positioned at nums[0].

Each element nums[i] represents the maximum length of a forward jump from index i. In other words, if you are at nums[i], you can jump to any nums[i + j] where:

Return the minimum number of jumps to reach nums[n - 1]. The test cases are generated such that you can reach nums[n - 1].

Jump Game II diagram

Example 1

Input: nums = [2,3,1,1,4]

Output: 2

Explanation: The minimum number of jumps to reach the last index is 2. Jump 1 step from index 0 to 1, then 3 steps to the last index.

Example 2

Input: nums = [2,3,0,1,4]

Output: 2

Constraints

  • 1 <= nums.length <= 10^4
  • 0 <= nums[i] <= 1000
  • It's guaranteed that you can reach nums[n - 1].

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