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SequenceTime Limit: 2000/2000 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 1589 Accepted Submission(s): 507 Problem Description Today, Soda has learned a sequence whose $n$-th $(n \ge 1)$ item is $3n(n-1)+1$. Now he wants to know if an integer $m$ can be represented as the sum of some items of that sequence. If possible, what are the minimum items needed? For example, $22 = 19 + 1 + 1 + 1 = 7 + 7 + 7 + 1$. Input There are multiple test cases. The first line of input contains an integer $T$ $(1 \le T \le 10^4)$, indicating the number of test cases. For each test case: There's a line containing an integer $m$ $(1 \le m \le 10^9)$. Output For each test case, output $-1$ if $m$ cannot be represented as the sum of some items of that sequence, otherwise output the minimum items needed. Sample Input
Sample Output
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