hi

i have a 1D matrix of coordinates (x[N]) and want to for each element of this array search that how many element is in the distance epsilon of that element. so i have a double loop, it’s like this code:

```
i=blockIdx.x * blockDim.x + threadIdx.x;
if(i < N-1){
for(j = 0; j < N; j++){
delta = x[i] - x[j];
if (delta < eposilon) counter += 1;
}
}
```

the problem is counter only for thread i = N-2 increasing and show the value counted for this thread, so it dos not counting the correct value. how can i place a counter in this double loop? please help me!