<pre class="shiki github-dark shaku"><code>// your code here, please don't use Omit&lt;T, K&gt; in your codetype MyExclude&lt;T, E&gt; = T extends E ? never : T;type MyOmit&lt;T, K extends string | number | symbol&gt; = { [P in MyExclude&lt;keyof T, K&gt;]: T[P]}</code></pre>

This is my accepted solution

Omit<T, K> returns a new type by picking the properties in T but not in K. Please implement MyOmit<T, K> by yourself. type Foo = { a: string b: number…