2020牛客暑期多校訓練營(第九場)E題 Groundhog Chasing Death

題意 計算 ∏ i = a b ∏ j = c d g c d ( x i , y j ) \prod_{i=a}^{b}\prod_{j=c}^{d}gcd(x^i,y^j) i=a∏b​j=c∏d​gcd(xi,yj)html 0 ≤ a , b , c , d ≤ 3 e 6 , 0 < x , y ≤ 1 e 9 , a ≤ b , c ≤ d ; 0 \leq a,b,c,d \leq

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