遅い→早い

英名Slow Then Very Fast

経験値の式: \begin{cases} \frac{ x^3 \left( 100 - x \right) }{50}, & \text{if } x \leq 50 \\ \frac{ x^3 \left( 150 - x \right) }{100}, & \text{if } 50 < x \leq 68 \\ \frac{ x^3 \left( 1274 + (x \bmod 3)^2 - 9 (x \bmod 3) - 20 \left\lfloor \frac{x}{3} \right\rfloor \right) }{1000}, & \text{if } 68 < x \leq 98 \\ \frac{ x^3 \left( 160 - x \right) }{100}, & \text{if } x > 98 \\ \end{cases}