You are given following:- - an array A consisting of N positive integers - Q queries of the form L,R,M consider all subsequences of subarray from L to R of size M. Determine the sum of Bitwise OR of all these s
Range Sum Query of binomial coefficients is almost doable in a MO's rolling manner. The details are easy to derive on your own. For the completness of the blog, they are included: Consider the following simple range sum query problem on binomial coefficients ProblemFind the following sums ,B...
由于随着右端点的增加圆肯定不断变大,所以右端点可以分成三段:[l,mid][l,mid]对应的圆完全包含[mid+1,r][mid+1,r]对应的圆,不存在包含关系和[l,mid][l,mid]对应的圆完全被[mid+1,r][mid+1,r]对应的圆包含,用 two pointers 维护三段分界点,左右两段显然可以O(1)O(1)求得,中间那段相当于要你维...
数据结构(线段树):CodeForces 85D Sum of Medians D. Sum of Medians time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output In one well-known algorithm of finding the k-th order statistics we should divide all elements into groups of five...
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Consider N boxes numbered 1 to N. Each box can house any number of chocolates. And initially all the boxes are empty. There are two types of queries that can be posed by the throwers. a. 0 l r -> Add chocolates to the boxes between the index l and r (inclusive) such that l'th...
In 1-D we can find sum in range [l, r] using sum[r] - sum[l - 1]. In 2-D we can find sum in range from (x1, y1) to (x2, y2) using sum[x2][y2] - sum[x2][y1] - sum[x1][y2] + sum[x1][y1] where sum[] or sum[][] is ...
the first thing may come to your mind is using a loop over this range and we are done. and that's totally fine and the simplest solution the better intresult=0;for(inti=2;i<=6;i++){result+=arr[i];} Butwhat if we have a lot of queries ? The running time of the previous nai...
similarly dp[i][j][1] stores the maximum value in this range. now for a bigger range you can check all middle breakpoints and combine them accordingly. that is dp[i][j][]=combine(dp[i][k][],dp[k][j][])..just check where you get max and min and store accordingly.(If you ...
Today, I get a problem. Sum ofgreatest odd divisorof numbers in range[a,b][a,b]witha,b<=109a,b<=109 I found solution here :https://www.geeksforgeeks.org/sum-of-greatest-odd-divisor-of-numbers-in-given-range/ But I think the solution is not clear for the even number case. ...