# -*- coding: utf-8 -*-
"""
Created on Fri Jan  8 10:17:01 2021

@author: SIO1
"""
N=int(input("Saisir l'age de johanna: "))
P=250
for i in range(N):
    P=P*(1+2.5/100)+250
    
  
print("La somme est de: ",round(P,2))