I saw a question somewhere, which asked to find the number of distinct numbers which can be represented as sum of two distinct primes. T=10000,N=10000000, the question felt impossible, so after attempting for a while, I saw the editorial, the solution was incorrect and poorly written. If ...
I can see that the result depends only on frequency of distinct values, and seems like some combinatorial trick, it's a made up question but seems standard, what is the most optimal solution for lengthNNarray? there are two ways to do this one way is dp assume each number selection as ...
A - Tricky SumCodeForces - 598A In this problem you are to calculate the sum of all integers from 1 ton, but you should take all powers of two with minus in the sum. For example, forn = 4 the sum is equal to - 1 - 2 + 3 - 4 = - 4, be...
http://codeforces.com/problemset/problem/598/A A. Tricky Sum time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output In this problem you are to calculate the sum of all integers from 1 to n, but you should take all powers of two with...
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Your task is to calculate the sum of values over all possiblegood paths. Since this number can be very large, output it modulo109+710^9 + 7109+7. Twogood pathsare considered different if the starting cell differs or there exists an integeri∈[1,k]i \in [1, k]i∈[1,k]such that...
1788B-SumOfTwoNumbers.cpp 1788C-MatchingNumbers.cpp 1789A-ServalAndMochasArray.cpp 1789B-ServalAndInversionMagic.cpp 1790A-PolycarpAndTheDayOfPi.cpp 1790B-TaisiaAndDice.cpp 1790C-Premutation.cpp 1790D-Matryoshkas.cpp 1790E-VladAndAPairOfNumbers.cpp 1791A-CodeforcesChecking.cpp 1791B-FollowingDirecti...
Printqqqintegers — the maximum value you can get for each of theqqqpossible valuesddd. Input There are two integers on the first line — the numbersnnnandqqq(1≤n≤5⋅1051 \leq n \leq 5 \cdot 10^51≤n≤5⋅105,1≤q≤5⋅1051 \leq q \leq 5 \cdot 10^51≤q≤5⋅105). ...
1 ton, but you should take all powers of two with minus in the sum. n = 4 the sum is equal to - 1 - 2 + 3 - 4 = - 4, because 1, 2 and 4 are 20, 21 and 22 tvalues ofn. Input ...
The first line of the input contains a single integer nn (1≤n≤2000001≤n≤200000) — the number of number tiles in the bag. The following line contains nn space-separated integers a1,a2,…,ana1,a2,…,an (ai∈{1,2}ai∈{1,2}) — the values written on the tiles. Output Output...