Question

人物等级初始为1级，提升到2级需要4点经验。

Answer 1

设升到等级X时需要的总经验为Y

y=2x(x-1) [2,11]

40(x-11)+3(x-10)(x-11)+220 [12,21]

100(x-21)+15(x-20)(x-21)+950 [22,31]

400(x-31)+50(x-30)(x-31)+3600 [32,41]

1400(x-41)+100(x-40)(x-41)+13100 [42,51]

3400(x-51)+150(x-50)(x-51)+38100 [52,61]

哎呀妈呀,费老鼻子劲了