OpenMP nested loop task parallelism, counter not giving correct result

Question

I am pretty new in openMP. I am trying to parallelize the nested loop using tasking but it didn't give me the correct counter output. Sequential output is "Total pixel = 100000000". Can anyone help me with that?

Note: I have done this using #pragma omp parallel for reduction (+:pixels_inside) private(i,j). This works fine now I want to use tasking.

what I have try so far:

#include<iostream>
#include<omp.h>
using namespace std;

int main(){
    int total_steps = 10000;

    int i,j;
    int pixels_inside=0;
    omp_set_num_threads(4);
    //#pragma omp parallel for reduction (+:pixels_inside) private(i,j)
    #pragma omp parallel
    #pragma omp single private(i)
    for(i = 0; i < total_steps; i++){
        #pragma omp task private(j)
        for(j = 0; j < total_steps; j++){
            pixels_inside++;
        }
    }

    cout<<"Total pixel = "<<pixels_inside<<endl;
    return 0;
}