typedef struct {
	uint32_t singular_anchor;
	uint32_t anchor_triplet;
	int *positive_axis;
	int *negative_axis;
	int margin;
} Edge;

typedef struct {
	uint32_t singular_anchor;
	uint32_t anchor_triplet;
	int *positive_axis;
	int *negative_axis;
	int margin;
} Edge;