Codeforces Round 794 (Div. 1)

Solutions for Codeforces Round 794 (Div. 1) (contest 1685). 0/6 problems verified against sample I/O. Difficulty range: 1100-3500.

6 items

Codeforces Round 794 (Div. 1)

Type: Div. 1 | Problems: 6 | Verified: 0/6 | Rating range: 1100-3500 | Time: 16m 30s

Problem	Name	Rating	Tags	Solve Time	Verified
A	Circular Local MiniMax	1100	constructive-algorithms, greedy, sortings	1m 57s	✗
B	Linguistics	2000	greedy, implementation, sortings	1m 49s	✗
C	Bring Balance	2600	brute-force, constructive-algorithms, greedy	45s	✗
D1	Permutation Weight (Easy Version)	2800	constructive-algorithms, dfs-and-similar, dsu	2m 19s	✗
D2	Permutation Weight (Hard Version)	3500	constructive-algorithms, greedy	7m 42s	✗
E	The Ultimate LIS Problem	3500	data-structures, greedy	1m 58s	✗

Practice › Codeforces Solutions › Codeforces Round 794 (Div. 1) ›

CF 1685D2 - Permutation Weight (Hard Version)

We are asked to transform one permutation into another in a way that minimizes a specific “weight” function. The weight is the sum of absolute differences between each element of the new permutation and the element of the original permutation located at the next position in…

Practice › Codeforces Solutions › Codeforces Round 794 (Div. 1) ›

CF 1685E - The Ultimate LIS Problem

We are given a permutation of size $2n+1$, and this array keeps changing through swaps of two positions. After every swap, we are not asked to analyze the array itself directly, but to consider all its cyclic rotations and determine whether at least one rotation has a…

Practice › Codeforces Solutions › Codeforces Round 794 (Div. 1) ›

CF 1685D1 - Permutation Weight (Easy Version)

We are given a permutation p of the numbers from 1 to n, and our task is to construct another permutation q of the same numbers that minimizes a specific weight function.

Practice › Codeforces Solutions › Codeforces Round 794 (Div. 1) ›

CF 1685A - Circular Local MiniMax

We are asked to arrange a set of integers on a circle so that each number is either strictly larger or strictly smaller than both of its neighbors. The input consists of multiple test cases. Each test case provides the number of integers, followed by the integers themselves.

Practice › Codeforces Solutions › Codeforces Round 794 (Div. 1) ›

CF 1685B - Linguistics

The solution addresses the exercise directly. It identifies the event $f(n)-f(n-1) = k$ as the occurrence of exactly $k-1$ consecutive terms outside the interval $[alpha,beta)$ followed by one term inside, which correctly models the "gap" between hits in the interval.

Practice › Codeforces Solutions › Codeforces Round 794 (Div. 1) ›

CF 1685C - Bring Balance

We are given a sequence of parentheses of length $2n$, containing exactly $n$ opening and $n$ closing brackets. The task is to transform this sequence into a correct balanced parentheses string using the minimum number of operations, where each operation consists of reversing…