好久以前就开始玩欧拉刷题（>800天），但是显然我做题速度远远低于它出题速度

虽然我不觉得欧拉的好友有什么很大的用处，不过如果想加我好友的可以点

主要是鸡毛突然从我的好友名单里面消失了……

My friend key: 383897_XvLOrlslgldrM18oPiOq78s9eq6mUa4B

如果加的人最好留下言，告诉我你是谁……

Please leave comment here and let me know who you are if you add friend…

我的解题记录：

• Problem 63 Powerful digit counts

• Problem 62 Cubic permutations

• Problem 61 Cyclical figurate numbers

• Problem 60 Prime pair sets

• Problem 59 XOR decryption

• Problem 58 Spiral primes

• Problem 57 Square root convergents

• Problem 56 Powerful digit sum

• Problem 55 Lychrel numbers

• Problem 54 Poker hands

• Problem 53 Combinatoric selections

• Problem 52 Permuted multiples

• Problem 51 Prime digit replacements

• Problem 50 Consecutive prime sum

• Problem 49 Prime permutations

• Problem 48 Self powers

• Problem 47 Distinct primes factors

• 【更新到5】Project Eulor Problem 1-26,30

• Problem 46 Goldbach’s other conjecture

• Problem 45 Triangular, pentagonal, and hexagonal

• Problem 44 Pentagon numbers

• Problem 43 Sub-string divisibility

• Problem 42 Coded triangle numbers

• Problem 41 Pandigital prime

• Problem 40 Champernowne’s constant

• Problem 39 Integer right triangles

• Problem 38 Pandigital multiples

• Problem 37 Truncatable primes

• Problem 36 Double-base palindromes

• Problem 35 Circular primes

• Problem 34 Digit factorials

• Problem 33 Digit cancelling fractions

• Problem 32 Pandigital products

• Problem 31 Coin sums

• Problem 29 Distinct powers

• Problem 27 Quadratic primes