https://oj.icpc.tw/contest/5/problem/DProblem Description: Define f( x ) as sum of digits of x, g( x ) as product of digits greater than 0 of x. Let D[ 1 ] = 8. D[ i ] = sum( f( D[ j ] ) + g( D[ j ] ) + 10 for j in range( 1, i ) ). Print D…

ICPC Blog Online JudgeProblem Description: Given A, B, print number of positive factors of all values between integer in [ A, B ].Constraints: 1 ≤ A ≤ B ≤ 1e14Solution: Consider calculating result of [ 1, B ] - [ 1, A - 1 ]. It uses simila…

https://oj.icpc.tw/contest/5/problem/BProblem Description: Define operator @ with following property: To calculate a @ b, first we transform them into base 3, then apply addition without carry. For example, 7 @ 8 = 21_3 @ 22_3 = 10_3 = 3. …