CF 1737D - Ela and the Wiring Wizard

Rating: 2200
Tags: brute force, dp, graphs, greedy, implementation, shortest paths
Solve time: 2m 25s
Verified: no

Solution

Correctness

The proposed solution does not provide any mathematical reasoning, derivation, or computation for the probability in question. It does not attempt to calculate the probability that $U_t$ is the last term of an upward run of length $h$ in the Fibonacci generator, nor does it compare it with the corresponding probability for a random sequence. There is no integration, measure-theoretic argument, or combinatorial analysis presented.

Gaps and Errors

Critical error: The solution does not address the problem at all. There is no probability calculation, no consideration of the dependencies introduced by the Fibonacci generator, and no comparison with a random sequence.
Justification gap: Every claim is missing, because no claims are made. There is no explanation of the conditions $U_0 > U_1 < \cdots < U_t > U_{t+1}$ or how to compute the associated probability.

Summary

The solution completely fails to engage with the problem. It neither constructs the correct formula nor provides reasoning to justify any answer.

VERDICT: FAIL - solution does not compute or justify the required probability.