Function isPaired

CodeChef_problems/CSUM/solution.cpp:5–17

isPaired will define whenever the array has paired that equal to k

// isPaired will define whenever the array has paired that equal to k
bool isPaired(vector<long long int> A, int length, int k) {
	int left=0, right = length - 1; // init left and right pointer for upper lower bound

	while(left < right) {
	    if (A[left] + A[right] < k)	left++; // increase lower bound if result < k
		else if (A[left] + A[right] > k) right--; // deacrease upper bound if result > k
	    else { // pair number is found. A[left] + A[right] = k
	        return true;
	    }
	}

    return false;
}

int main() {
	int t, n;