# Inspired by Rishabh Deep Singh

Calculus Level 5

$\large \int _{ 0 }^{ 100 }{ \lfloor x-0.5 \rfloor \, d \lfloor x \rfloor }$

Evaluate the Riemann-Stieltjes integral above.

Enter 666 if you come to the conclusion that this integral fails to exist.

Notation: $$\lfloor \cdot \rfloor$$ denotes the floor function.

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