摘要:
codeforces 714 A Today an outstanding event is going to happen in the forest — hedgehog Filya will come to his old fried Sonya! Sonya is an owl and sh 阅读全文
摘要:
Codeforces 1060 b You are given a positive integer nn. Let S(x)S(x) be sum of digits in base 10 representation of xx, for example, S(123)=1+2+3=6S(123 阅读全文