100 light bulbs are numbered from 1 to 100. Student No. 1 presses all the bulbs numbered in multiples of 1 once (on), student No. 2 presses all bulbs numbered in multiples of 2 once (off), student No. 3 The students numbered 3..., the students numbered 100 pressed the multiples of 100, how many light bulbs were on in the end.
100个灯泡按1～100编号，1号同学将编号为1的倍数的灯泡全部摁了一遍(亮)，2号同学将编号为2的倍数的灯泡全部摁了一遍(关)，3号同学将编号为3的…，100号同学将编号为100的倍数摁了一遍，最后有多少个灯泡是亮着的．
<result>10</result>