SRM
SRM147 DIV1 1000pt DP
SRM148 DIV1 1100pt 递归
SRM149 DIV1 1000pt math
SRM150 DIV1 500pt DP
SRM469 DIV1 500pt DP
SRM470 DIV1 500pt math, 期望
SRM472 DIV1 600pt math
SRM475 DIV1 300pt think
SRM
SRM147 DIV1 1000pt DP
SRM148 DIV1 1100pt 递归
SRM149 DIV1 1000pt math
SRM150 DIV1 500pt DP
SRM469 DIV1 500pt DP
SRM470 DIV1 500pt math, 期望
SRM472 DIV1 600pt math
SRM475 DIV1 300pt think