[amelius]

It doesn't matter if the answer is wrong. You run the test program and then replace the code by the answer. This basically weeds out the UB.

[yongjik]

But since it is a UB, there's no guarantee that your test program produces the same result as the same code running on production, even if you have the same compiler.

[amelius]

That's very unlikely, and in the worst case you've reduced a difficult bug into an easier to understand bug.

[1718627440]

That's a valid approach, if you only use high-level language to generate assembly faster, and the assembly is your source of truth.