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cf 1174 D Ehab and the Expected XOR Problem cf 1169 C Increasing by Modulo codeforces 1187 B Letters Shop 康拓展开和逆康拓展开 HDU 3625 2019.7.10 2019.7.9 Alternative Accounts 贪心匹配 线性基+并查集 字符串hash+二分答案 数论四大定理 数论四大定理
cf 1174 D Ehab and the Expected XOR Problem
cf 1169 C Increasing by Modulo
codeforces 1187 B Letters Shop
康拓展开和逆康拓展开
HDU 3625
2019.7.10
2019.7.9
Alternative Accounts 贪心匹配
线性基+并查集
字符串hash+二分答案
数论四大定理