diff --git a/src/my_project/interviews/amazon_high_frequency_23/round_8/jump_game_ii.py b/src/my_project/interviews/amazon_high_frequency_23/round_8/jump_game_ii.py new file mode 100644 index 00000000..1ef43897 --- /dev/null +++ b/src/my_project/interviews/amazon_high_frequency_23/round_8/jump_game_ii.py @@ -0,0 +1,33 @@ +from typing import List + +class Solution: + def jump(self, nums: List[int]) -> int: + """ + Greedy approach: At each position, jump to the farthest reachable index + + Example: [2,3,1,1,4] + - From index 0 (value=2): can reach indices 1,2 + - Greedy choice: Jump to index 1 (value=3) because it reaches farthest + - From index 1: can reach indices 2,3,4 (end) + - Answer: 2 jumps + """ + + if len(nums) <= 1: + return 0 + + jumps = 0 + current_end = 0 # End of current jump range + farthest = 0 # The farthest position we can reach + + for i in range(len(nums) - 1): + # Update farthest position reachable + farthest = max(farthest, i + nums[i]) + + # If we've reached the end of current jump range + if i == current_end: + jumps += 1 + current_end = farthest # Make the greedy choice + + if current_end > len(nums) - 1: + break + return jumps \ No newline at end of file