11. There are 10 young men, each with a different weight and height; for any two young men $\mathbf{A}$ and $\mathbf{B}$, if $\mathbf{A}$ is heavier than $\mathbf{B}$, or $\mathbf{A}$ is taller than $\mathbf{B}$, then we say “A is not worse than B”; if a young man is not worse than the other 9 people, he is called a “great guy”. How many “great guys” can there be at most among these 10 people?
【Analysis】Let's assume the heights of 10 people are $1, 2, 3, 4, 5, 6, 7, 8, 9, 10$, and the weights of 10 people are $10, 9, 8, 7, 6, 5, 4, 3, 2, 1$. For any two people $\mathrm{A}$ and $\mathrm{B}$, either $\mathrm{A}$ is taller than $\mathrm{B}$ and $\mathrm{B}$ is heavier than $\mathrm{A}$, or $\mathrm{A}$ is heavier than $\mathrm{B}$ and $\mathrm{B}$ is taller than $\mathrm{A}$. This means that $\mathrm{A}$ is not worse than $\mathrm{B}$, and at the same time, $\mathrm{B}$ is not worse than $\mathrm{A}$. Therefore, all 10 people can be considered good guys, so the maximum number of good guys can be 10.