Minimum Jumps
Detailed guide and Python implementation for the 'Minimum Jumps' problem.
Problem Statement
Write a function min_jumps(arr) that finds the minimum number of jumps to reach the last index of arr starting from index 0. Each element in the array represents the maximum jump length from that position. If it is impossible to reach the last index, return -1.
- •1 <= len(arr) <= 10^4
- •0 <= arr[i] <= 10^4
Examples
min_jumps([1, 3, 5, 8, 9, 2, 6, 7, 6, 8, 9])
3
Jump from index 0 to 1 (value 3), then jump to index 4 (value 9), and then jump to the last index.
min_jumps([1, 1, 1, 1, 1])
4
Jump one by one from start to end, requiring 4 jumps.
Need a Hint?
Edge Cases to Watch
- Empty input structures
- Single element inputs
- Large numerical bounds
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