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First solution in Clear category for Rectangles Union by Tinus_Trotyl
from typing import List, Tuple
def rectangles_union(recs: List[Tuple[int]]) -> int:
return len({(x, y) for rec in recs for y in range(rec[1], rec[3]) for x in range(rec[0], rec[2])})
Nov. 1, 2019