Codeforces Round #456 (Div. 2) B. New Year’s Eve 贪心、构造、位运算、异或和
B. New Year's Eve 贪心、构造、位运算、异或和 My Solution 题意:给出1~n这n个数,最多选k个数,…
B. New Year's Eve 贪心、构造、位运算、异或和 My Solution 题意:给出1~n这n个数,最多选k个数,…
J. Divisible Numbers 位运算+优化+前缀和 Source 2016 ACM Amman Collegiate Programming Contest…