**Knowing that**

- A is the starting point
- B is the destination point
- D is the step size

**Assume that**

- A, B and D are integers and > 0;
- A ≤ B.

public int calc(int A, int B, int D) {
if ( A == B ) return 0;
int dist = B - A;
int steps = dist/D;
if ( dist%D !=0 ){
steps +=1;
}
return steps;
}

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