%12.5+(25%+26%+27%+28%+29%30%+31%+32%+33%+34%+35%+36%+37%+38
%12.5+(25%+26%+27%+28%+29%30%+31%+32%+33%+34%+35%+36%+37%+38
20*21*22*23*24*25*26*27*28*29*30*31*32*33*34*35*36*37*38*39*
21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,
21、22、23、24、25、26、27、28、29、30、31、32、33、34、35、36、37、38、39、40、
29,34,26,31,37,30,32,28,40,36,30,27,33,32,37,31,35,30,26,34,
29 34 26 31 37 30 31 29 28 40 36 32 30 27 33 32 37 31 35 30
19,23,26,29,28,32,34,35,41,33,31,25,27,31,36,37,
21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40=
19,23,26,29,28,32,34,35,41,33,31,25,27,31,36,37,24,31,29,26,
19 23 26 29 28 32 34 35 41 33 31 25 27 31 36 37 24 31 29 26
19 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37的众数
18,24,26,29,28,32,34,35,41,33,31,27,31,36,37,24,31,29,30