C1 (5-6, Hungary) 5 students $A, B, C, D, E$ participate in a competition. Two people are guessing the results. One person guessed the order as $A, B, C, D, E$, and got none of the students' positions correct, nor did they guess any pair of students' positions as adjacent (a pair of students' positions are adjacent if one position directly follows the other). The other person guessed the order as $D, A, E, C, B$, and got two students' positions correct, and also guessed two pairs of students' positions as adjacent. What is the actual result of the competition?
Solve: List the rankings guessed by the two individuals as follows:
\begin{tabular}{|c|l|l|l|l|l|}
\hline Rank & 1 & 2 & 3 & 4 & 5 \\
\hline First person & $A$ & $B$ & $C$ & $D$ & $E$ \\
\hline Second person & $D$ & $A$ & $E$ & $C$ & $B$ \\
\hline
\end{tabular}

Since the second person only guessed two consecutive rankings correctly, and guessed the rankings of two students correctly, a pair of consecutive rankings is either both guessed correctly or both not guessed correctly (because if one is guessed correctly, the other must also be guessed correctly). Therefore, it can only be that the consecutive pairs $D A$ and $C B$ were guessed correctly.

If the rankings of $D A$ were both guessed correctly, then the rankings of $C, B$ must not have been guessed correctly, which would mean the order must be $D A C B E$, contradicting the fact that the first person guessed all wrong.

If the rankings of $C B$ were both guessed correctly, then the rankings of $D, A$ were not guessed correctly, but since $D, A$ are consecutive, the only possible order is $E D A C B$.
In conclusion, the rankings of the five students are EDACB.