pMATE: A Privacy-Preserving Map Retrieval Task Assignment Scheme in Spatial Crowdsourcing

Algorithm 4

FMN.

	Input: 𝕄’;
	Output: int x[];   //an array of the nearest TWs’ numbers
	Initialize int k, p, i ← n − 1, j ← n;   //n =
	While do
	p ←
	if p = −1  //
	j ← i, i ← i − 1;
	else  //
	i ← i − 1;
	p ←
	if p = 1  //return j, set j max
	x[] = FE (j);
	return x[];
	else  //return 1, set 1 max
	x[] = FE (1);
	return x[];