Tuesday, May 11, 2021

LOVE BABBAR 450 Q SHEET SOLUTIONS - ARRAY SOLUTIONS

 LOVE BABBAR 450 Q SHEET SOLUTIONS - ARRAY SOLUTIONS

5 - MOVE ALL NEGATIVE ELEMENTS OF ARRAY TO ONE SIDE OF ARRAY

A. WITH EXTRA SPACE ALLOWED

Q1- Given an unsorted array having both negative and positive integers. The task is place all negative element at the end of array without changing the order of positive element and negative element.

S1 

void segregateElements(int arr[],int n)

    {

        int temp[n];

        int j = 0;

        

        for(int i = 0; i < n; i++){

            if(arr[i] > 0)

                temp[j++] = arr[i];

        }

        

        if(j == n || j == 0)

            return;

        for(int i = 0; i < n; i++){

            if(arr[i] < 0)

                temp[j++] = arr[i];

        }

        memcpy(arr, temp, sizeof(temp));

    }


6- UNION AND INTERSECTION OF 2 ARRAYS

6A- UNION OF 2 ARRAY

S1- USING SET

int doUnion(int a[], int n, int b[], int m)  {

        set<int>s;

        for(int i = 0; i < n; i++){

            s.insert(a[i]);

        }

        for(int i = 0; i < m; i++){

            s.insert(b[i]);

        }

        return s.size();

    }


6B - INTERSECTION OF 2 ARRAYS

S1- USING SET

int NumberofElementsInIntersection (int a[], int b[], int n, int m )

    {

        int cntIntersect = 0;

        set<int>s;

        set<int>in;

        for(int i = 0; i < n; i++){

            s.insert(a[i]);

        }

        for(int i = 0; i < m; i++){

            if(s.count(b[i]) == 1 && in.count(b[i]) == 0){

                in.insert(b[i]);

                cntIntersect++;

            }

        }

        return cntIntersect;

    }

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