There Are 71 Perfect Squares Less Than 5050

Let a 1 , a 2 , , a 100 a_1, a_2, \ldots, a_{100} be a permutation of the numbers 1 , 2 , 3 , , 100 1,2,3, \ldots ,100 .

Let S i = a 1 + a 2 + + a i S_i=a_1+a_2+\cdots +a_i .

What is the maximum number of perfect squares among the numbers S 1 , S 2 , , S 100 S_1,S_2, \ldots ,S_{100} ?


The answer is 60.

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