
正文
leetcode 1. Two Sum [java]
提示:扫一扫查出行【扫一扫了解最新限行尾号】
复制提示
注意点:- HashMap<Integer, Integer>
- return new int[]{};
- 3 2 4 target:6
- return null;
public int[] twoSum(int[] nums, int target) {
HashMap<Integer, Integer> m = new HashMap<>();
for(int i = 0; i < nums.length; ++i){
if(m.containsKey(target - nums[i]))
return new int[]{m.get(target - nums[i]), i};
m.put(nums[i], i);
}
return null;
}







