两数之和

 

public class Solution {
    public int[] TwoSum(int[] nums, int target) {
        int length = nums.Length;
            int[] res={};
            for (int i = 0; i < length - 1; i++)
            {
                for (int j = i + 1; j < length; j++)
                {
                    int sum = nums[i] + nums[j];
                    if (sum == target)
                    {
                        res =new int[] { i, j };
                    }
                }
            }
        return res;
    }
}