2023. Number of Pairs of Strings With Concatenation Equal to Target

class Solution {
    public int numOfPairs(String[] nums, String target) {
        int n = nums.length;
        int ans=0;
        for(int i =0;i<n;i++){
            for(int j =0; j<n;j++){
                if( i != j){
                    String str = nums[i] + nums[j];
                    if (str.equals(target)){
                        ans++;
                    }
                }
            }
        }
        return ans;
        
    }
}