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,…
D. Mishka and Interesting sum 离线操作,树状数组,last[value],异或和 Source Codeforces Roun…