https://leetcode-cn.com/problems/search-in-rotated-sorted-array/

解決方案

class Solution {public int search(int[] nums, int target) {int n = nums.length;if (n == 0) {return -1;}if (n == 1) {return nums[0] == target ? 0 : -1;}int l = 0, r = n - 1;while (l <= r) {int mid = (l + r) / 2;if (nums[mid] == target) {return mid;}if (nums[0] <= nums[mid]) {if (nums[0] <= target && target < nums[mid]) {r = mid - 1;} else {l = mid + 1;}} else {if (nums[mid] < target && target <= nums[n - 1]) {l = mid + 1;} else {r = mid - 1;}}}return -1;} }

總結

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