Minimum of subsequences
Problem 375Published on Saturday, 10th March 2012, 10:00 pm; Solved by 461
Let Sn be an integer sequence produced with the following pseudo-random number generator:
|Sn+1||=||Sn2 mod 50515093|
Let A(i, j) be the minimum of the numbers Si, Si+1, ... , Sj for i j.
Let M(N) = ΣA(i, j) for 1 i j N.
We can verify that M(10) = 432256955 and M(10 000) = 3264567774119.
Find M(2 000 000 000).