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  1. nums = [ [2018 + j*10] + 4*[0] for j in range(11) ]
  2.  
  3. # 0 the numbers represent year 
  4. # 1 out of fertile window people
  5. # 2 fertile population 
  6. # 3 children 
  7. # 4 newborns
  8.  
  9. for i, j in enumerate(nums):
  10.     if i == 0:
  11.         nums[0] = [2018, 0, 7, 0, 0]
  12.         print(nums[i])
  13.         continue
  14.     # the if takes care of people going out of the fertility window
  15.     if i > 2:
  16.         # fertile people are previous + people who became fertile 30 years ago 
  17.         nums[i][1] = nums[i-1][1] + (nums[i-3][2] - nums[i-4][2])
  18.         # the fertile people are previous - those who became fertile 30 years ago 
  19.         nums[i][2] = nums[i-1][2] - (nums[i-3][2] - nums[i-4][2])
  20.     # fertile people are fertile + previous children 
  21.     nums[i][2] = nums[i-1][2] + nums[i-1][3]
  22.     # children are previous newborns
  23.     nums[i][3] = nums[i-1][4]
  24.     # newborns are 140% of the fertile people 
  25.     nums[i][4] = round(nums[i-1][2] * 1.4)
  26.     print(nums[i])
  27.  
Success #stdin #stdout 0.02s 6936KB
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[2018, 0, 7, 0, 0]
[2028, 0, 7, 0, 10.0]
[2038, 0, 7, 10.0, 10.0]
[2048, 7, 17.0, 10.0, 10.0]
[2058, 7, 27.0, 10.0, 24.0]
[2068, 7, 37.0, 24.0, 38.0]
[2078, 17.0, 61.0, 38.0, 52.0]
[2088, 27.0, 99.0, 52.0, 85.0]
[2098, 37.0, 151.0, 85.0, 139.0]
[2108, 61.0, 236.0, 139.0, 211.0]
[2118, 99.0, 375.0, 211.0, 330.0]
https://ideone.com/lkmk6v
language:
Python (cpython 2.7.16)
created:
7 years ago
visibility:
public

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