「cf519A」AandBandChess模拟[crayon-6634baaf7dc76399245837/]「cf519B」AandBandCompilationErrors排序,双指针对比用个hash/map统计下元素出现次数[crayon-6634baaf7dc80767545163/]「cf519C」AandBandTeamTraining实际上答案是min(n,m,(m+n)/3)我分类讨论了TAT还是很好yy的[crayon-6634baaf7dc86846205699/]「cf519D」AandBandInterestingSubstringsa[i][j]表示前缀和为i,字母j为末尾的前缀数量每次查询...
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