1. Two Sum

public class Solution {
    public int[] twoSum(int[] nums, int target) {
        int [] res=new int[2];
        int size=nums.length;
        boolean isGot=false;
        int i=0;
        int j=0;
        for(i=0;i<size;i++)
        {
            for(j=i+1;j<size;j++)
                
            {
                if(nums[i]+nums[j]==target)
                {
                    isGot=true;
                    break;
                }
            }
            if(isGot==true)
                break;
        }
        
        res[0]=i;
        res[1]=j;
        return res;
        
    }
}