Given several time values, determine whether a valid configuration exists according to the problem's rules.
You are given a set of time-like values. Your task is to determine whether they can be arranged or transformed to satisfy the condition described by the problem.
The core challenge is to reason about the values carefully, often using ordering, greedy selection, and arithmetic constraints rather than brute force.
Because the original statement is unavailable here, this practice version focuses on the same general style: analyze the input, apply the required validity checks, and print the appropriate result.
Input Format
- The first line contains an integer .
- The next line contains integers describing the given values.
The exact interpretation of the values follows the problem's validity rules.
Output Format
- Print the required answer for the given instance.
- The answer is typically a single value such as
YES/NOor the resulting transformed value, depending on whether the configuration is valid.
Constraints
- Values fit in standard 32-bit signed integers.
- Use a solution that is efficient enough for a medium-difficulty contest problem.
Example 1
Input
4 1 2 3 4
Output
YES
Explanation
This illustrative example shows a simple feasible case after applying the required checks.
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