package com.leetcode.leetcode.licm;
import java.util.HashMap;
import java.util.Map;
/**
* @description: 剑指 Offer 57. 和为s的两个数字
* 输入一个递增排序的数组和一个数字s,在数组中查找两个数,使得它们的和正好是s。如果有多对数字的和等于s,则输出任意一对即可。
* <p>
* <p>
* <p>
* 示例 1:
* <p>
* 输入:nums = [2,7,11,15], target = 9
* 输出:[2,7] 或者 [7,2]
* 示例 2:
* <p>
* 输入:nums = [10,26,30,31,47,60], target = 40
* 输出:[10,30] 或者 [30,10]
* <p>
* <p>
* 限制:
* <p>
* 1 <= nums.length <= 10^5
* 1 <= nums[i] <= 10^6
* @author: licm
* @create: 2021-08-03 09:40
**/
public class Lc剑指Offer57和为s的两个数字 {
/**
* 俩数字和问题
*
* @param nums
* @param target
* @return
*/
public static int[] twoSum(int[] nums, int target) {
Map<Integer, Integer> map = new HashMap<>();
for (int i = 0; i < nums.length; i++) {
if (map.containsKey(target - nums[i])) {
int[] res = new int[2];
res[0] = nums[i];
res[1] = target - nums[i];
return res;
} else {
map.put(nums[i], i);
}
}
return null;
}
public static void main(String[] args) {
int[] nums = {2, 7, 11, 15};
int target = 9;
int[] res = twoSum(nums, target);
for (int i = 0; i < res.length; i++) {
System.out.println(res[i]);
}
}
}