「cf519A」AandBandChess模拟[crayon-6743563c77c45970535580/]「cf519B」AandBandCompilationErrors排序,双指针对比用个hash/map统计下元素出现次数[crayon-6743563c77c50691482553/]「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-6743563c77c55072188055/]「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...
Drazilcreatedafollowingproblemaboutputting1 × 2tilesintoann × mgrid:"Thereisagridwithsomecellsthatareemptyandsomecellsthatareoccupied.Youshoulduse1 × 2tilestocoverallemptycellsandnotwotilesshouldcovereachother.Andyoushouldprintasolutionabouthowtodoit."ButDrazildoesn'tliketowritespecialcheckingprogramforthistask.Hisfriend,Vardaadvisedhim:"howaboutaskingcontestantonlytoprintthesolut...
Youhavematrixaofsizen × n.Let'snumbertherowsofthematrixfrom1tonfromtoptobottom,let'snumberthecolumnsfrom1tonfromlefttoright.Let'suseaijtorepresenttheelementontheintersectionofthei-throwandthej-thcolumn.Matrixameetsthefollowingtwoconditions:foranynumbersi, j(1 ≤ i, j ≤ n)thefollowinginequalityholds:aij ≥ 0;.Matrixbisstrictlypositive,ifforanynumbersi, j(1 ≤ i, j ≤ n)theine...
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