#!/usr/bin/ruby

puts "Int:"
int = gets.to_i
puts "Spellcasting:"
spc = gets.to_i
puts "Avg of spell schools:"
sch = gets.to_i
puts "Number of enhancers (possibly negative):"
enh = gets.to_i
puts "Mons MR:"
mr = gets.to_i

rawpower = (int / 10) * (spc/2 + sch*2) * (1.5**enh)

puts "Raw spellpower: #{rawpower}"

def adjust(x,a,b,c,d)
  return x if x <= a
  r = a
  a.step(c,b) do |i|
    if r > i
      r = (r-i)/2 + i
    else
      break
    end
  end
  r = d if r > d
  r
end

adjustedpower = adjust(rawpower, 50, 50, 150, 200)

puts "Adjusted spellpower: #{adjustedpower}"

enchpower = adjust(adjustedpower, 30, 40, 100, 120)

mrchance = 100+mr - enchpower

props = []
20.times do
  succ = 0
  1000.times { succ += 1 if mrchance < (1+rand(100) + 1+rand(101)) }
  props <<  (succ.to_f / 10).to_i
end
props.sort!

puts "Ench success: (#{props[1]}, #{props[18]}) %"