Day91.cpp

 static void sort012(int a[], int n)

    {

        // code here 

        int z =0, o =0, t=0;

        for(int i=0;i<n;i++){

            if(a[i]==0)z++;

            else if(a[i]==1)o++;

            else t++;

        }

        

        for(int i=0;i<n;i++){

            if(z>0){

                a[i] = 0;

                z--;

            }else if(o>0){

                a[i] = 1;

                o--;

            }else{

                a[i] = 2;

                t--;

            }

        }

    }