There is an iron wire with a length of 21 centimeters, try to cut it into n small pieces (the length of each piece is not less than 1 whole centimeter), so that any three pieces in the period cannot be assembled into a triangle, then the number of cut pieces What is the maximum value of n
有一根长为21厘米的铁丝，想办法把它截成n小段(每段的长度均为不小于1的整厘米数)，使得期中任意的三段都无法拼成三角形，那么截成的段数n其最大值是多少
<result>6</result>