题目内容：

A is a natural number .if A subtracts 1,3,5...(some continous odd numbers )until it cannot subtract more ,the result will be 29 ;if A subtracts 2,4,6...(some continous even numbers )until it cannot subtract more ,the result will be 13 .so what is A 紧急!

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题：A是一个自然数.如果从A中一次减去1,3,5,.若干个连续奇数,剩下29; 如果从A依次减去2,4,6若干个连续偶数,剩下13.求A的值.
29-13=16
每次偶数比奇数多见1
16个
29+（1+1+2*15）*16/2=285