[CodeChef]2014 September Challenge
前五道不说了。
CHEFINV：动态逆序对树套树还要想吗？不过总感觉这题离线可做。
SEABUB：[tex]dp[i][j][/tex]表示剩[tex]i[/tex]步逆序对为[tex]j[/tex]时的期望。首先[tex]k\leqslant n^2[/tex]所以暴力是[tex]O(n^4T)[/tex]然后发现第i步的状态很有规律，可以直接存然后就[tex]O(n^3+n^2T)[/tex]了。然后我预处理比较浪就成了[tex]O(n^3T)[/tex]慢的要死。
QRECT：相交数=总数-右边-上面-左边-下面+四个角。边上一维数点角上二维数点。
FIBTREE：我想吐槽出这种题有意思吗，简直像fcuk_zjoi_2014一样。CF-#FF-C + llj树链剖分 + 主席树。没了。
CHALLENGE：这次challenge太神了，除了暴力以外根本没想法。。。然后靠多组数据小技巧骗了点分。。。大概就是每次暴力期望最高的那组数据然后卡下时。。。由于比较懒直接上的python。。。但是python实在是太慢了python实在是太慢了，因为很重要所以说两遍。然后发现王强松靠常数优化轻松拿刀orzorzorz
2014年10月06日 04:25
Hey, i have been trying to solve sereja and strings problem and even after many attempts still not able to do so.My solution is weighted operation levenshtien distance with cut-off distance.. solution is O(nk).. If u can give some pointers towards the possible solution.. thanx in advance
2022年9月21日 01:43
Hindi is our national language and the State board students have chosen the Hindi language as the Second or Third language for Class 7th Grade. AP 7th Class Hindi Model Paper So, every student must have minimum awareness of our Second or Third language of Hindi. School Education Department provided the SCERT AP 7th Class Hindi Model Papers 2023 with study material for both Telugu Medium, English Medium and Hindi Medium Students of the State to get new exam question patterns and regular practices.