- 桁数が多い整数の処理
途中で割り算が入る場合、桁数が大きくなるとfloat
の精度が保たれなくなる。確実にint
になる//
を使うべし
例: ABC139 D
x: int(n*(n-1)/2)
o: n*(n-1)//2
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