1342C

1342C is a problem code used on Codeforces, indicating the third problem (problem C) in contest number 1342. Codeforces uses this convention to categorize tasks within a single contest, helping participants identify the relative difficulty and position of a problem.

The exact statement of 1342C varies by contest, but problems with this code typically present a computational task that requires deriving an efficient algorithm to produce a numerical or categorical answer from the given input. Submissions are evaluated against multiple test cases to verify correctness and efficiency.

Solutions to 1342C generally rely on common algorithmic techniques appropriate for problem C difficulty. This can include dynamic programming, greedy approaches, combinatorial counting, or two-pointer and prefix-sum methods. In many cases, contestants must recognize a structural property, reduce the problem to a simpler subproblem, and prove correctness by invariant or case analysis. Handling edge cases carefully is often essential for passing all tests.

Time and space efficiency are important considerations, as contest constraints usually demand near-linear or better solutions. Participants frequently implement modular arithmetic to manage large counts, and may use data structures or careful enumeration to keep the solution within time limits.

The problem has an editorial and multiple accepted solutions available in the Codeforces problemset, making 1342C a common reference point for learning counting, optimization, and problem-solving techniques in competitive programming.

See also: Codeforces problemset entry for 1342C, and related resources on algorithmic problem solving and editorial explanations.