Question

题目内容

解题思路

哈希表，两数之和变为两数之差。

代码实现

const twoSum = (nums: number[], target: number): number[] => {
  const mapObj: Map<number, number> = new Map();
  for (let i = 0; i < nums.length; i++) {
    if (mapObj.has(target - nums[i])) {
      return [mapObj.get(target - nums[i]), i];
    } else {
      mapObj.set(nums[i], i);
    }
  }
};