isi, cmi practice problem: Let $f:\mathbb{N} \to \mathbb{N}$ satisfying the conditions: (i) $x - f(x) = 19 \left[ \frac{x}{19} \right] - 90 \left[ \frac{f(x)}{90} \right]$ (ii) $1900 < f(1900) < 2000$ where $[x]$ denotes the ...

 Question:

Join on telegram: https://t.me/solvopia_isi