sort(nums.begin() , nums.end());
        int i=0;
        int j= nums.size()-1;

        while(i!=j){
            int sum = nums[i] + nums[j];
            if(sum==target){
                return "YES";
                // break;
            }
            else{

                sum < target ? i++ : j--;
            }
        }
        return "NO";

Though the code is correct and test cases are passing while submitting the code it shows error . Is it happening with everyone?

My code:

void bubbleSort(int arr[], int n) 
{
    //write your code here
    if(n==0) return;
    
    for(int i=0;i<n-1; i++){
        if(arr[i] > arr[i+1]){
            swap(arr[i] , arr[i+1]);
        }
    }
    
    bubbleSort(arr , n-1);
}

int sumFirstN(int n) {

    // Write Your Code Here

    if(n==1){

        return 1;

    }

    return n + sumFirstN(n-1);

}

just wanted to know why its partially correct?