From A.Y. Jackson S.S., Olympiads School, University of Waterloo
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i made it...
6QHdDyTZe/LqGbmJxHmnFQucoe2FD8e3tMbP64jCj2A=
https://dmoj.ca/problem/tle15p5
3d2a71f3cd3d7d38a5df7ba28be6795dc378cf14d00df40291be95f78ecc67ee
Nov 26 - rank 420
usaco20decs3 usaco20decb3 ccc10s3 p̸̧̟̩̩̣̙̫̭̩̣͇͕̭͙̼̼̪̅ͯͨ̈́̆ͤ̅̌̓̿ͩ͗͑͐͋ͅi̬̠̘̖̎͐̄ͮͤ̅̃ͧ̾ͨ̆ͯ͒ͪ̇̏̐ͭ́͞ğ̷̸̸̪͙̣̂ͬ̈́̆͂̃͗ͩ͜͞g̷̯̱͚̖͈̦̲̖͚̖͖̠͕͛̓̊̓̾̈ͫͫ̔̇ͧ̈̚͘͘̕͠ŷ͕̻̖͖̙̬͈̭̰͓̦͖̦͍̩͈̗̳͂͂̑͐͐̑ͧͨ̊͆̑̄ͫ͆͋ͩ͂̚̕͢͡ p̸̧̟̩̩̣̙̫̭̩̣͇͕̭͙̼̼̪̅ͯͨ̈́̆ͤ̅̌̓̿ͩ͗͑͐͋ͅi̬̠̘̖̎͐̄ͮͤ̅̃ͧ̾ͨ̆ͯ͒ͪ̇̏̐ͭ́͞ğ̷̸̸̪͙̣̂ͬ̈́̆͂̃͗ͩ͜͞g̷̯̱͚̖͈̦̲̖͚̖͖̠͕͛̓̊̓̾̈ͫͫ̔̇ͧ̈̚͘͘̕͠ŷ͕̻̖͖̙̬͈̭̰͓̦͖̦͍̩͈̗̳͂͂̑͐͐̑ͧͨ̊͆̑̄ͫ͆͋ͩ͂̚̕͢͡ p̸̧̟̩̩̣̙̫̭̩̣͇͕̭͙̼̼̪̅ͯͨ̈́̆ͤ̅̌̓̿ͩ͗͑͐͋ͅi̬̠̘̖̎͐̄ͮͤ̅̃ͧ̾ͨ̆ͯ͒ͪ̇̏̐ͭ́͞ğ̷̸̸̪͙̣̂ͬ̈́̆͂̃͗ͩ͜͞g̷̯̱͚̖͈̦̲̖͚̖͖̠͕͛̓̊̓̾̈ͫͫ̔̇ͧ̈̚͘͘̕͠ŷ͕̻̖͖̙̬͈̭̰͓̦͖̦͍̩͈̗̳͂͂̑͐͐̑ͧͨ̊͆̑̄ͫ͆͋ͩ͂̚̕͢͡ p̸̧̟̩̩̣̙̫̭̩̣͇͕̭͙̼̼̪̅ͯͨ̈́̆ͤ̅̌̓̿ͩ͗͑͐͋ͅi̬̠̘̖̎͐̄ͮͤ̅̃ͧ̾ͨ̆ͯ͒ͪ̇̏̐ͭ́͞ğ̷̸̸̪͙̣̂ͬ̈́̆͂̃͗ͩ͜͞g̷̯̱͚̖͈̦̲̖͚̖͖̠͕͛̓̊̓̾̈ͫͫ̔̇ͧ̈̚͘͘̕͠ŷ͕̻̖͖̙̬͈̭̰͓̦͖̦͍̩͈̗̳͂͂̑͐͐̑ͧͨ̊͆̑̄ͫ͆͋ͩ͂̚̕͢͡ p̸̧̟̩̩̣̙̫̭̩̣͇͕̭͙̼̼̪̅ͯͨ̈́̆ͤ̅̌̓̿ͩ͗͑͐͋ͅi̬̠̘̖̎͐̄ͮͤ̅̃ͧ̾ͨ̆ͯ͒ͪ̇̏̐ͭ́͞ğ̷̸̸̪͙̣̂ͬ̈́̆͂̃͗ͩ͜͞g̷̯̱͚̖͈̦̲̖͚̖͖̠͕͛̓̊̓̾̈ͫͫ̔̇ͧ̈̚͘͘̕͠ŷ͕̻̖͖̙̬͈̭̰͓̦͖̦͍̩͈̗̳͂͂̑͐͐̑ͧͨ̊͆̑̄ͫ͆͋ͩ͂̚̕͢͡ p̸̧̟̩̩̣̙̫̭̩̣͇͕̭͙̼̼̪̅ͯͨ̈́̆ͤ̅̌̓̿ͩ͗͑͐͋ͅi̬̠̘̖̎͐̄ͮͤ̅̃ͧ̾ͨ̆ͯ͒ͪ̇̏̐ͭ́͞ğ̷̸̸̪͙̣̂ͬ̈́̆͂̃͗ͩ͜͞g̷̯̱͚̖͈̦̲̖͚̖͖̠͕͛̓̊̓̾̈ͫͫ̔̇ͧ̈̚͘͘̕͠ŷ͕̻̖͖̙̬͈̭̰͓̦͖̦͍̩͈̗̳͂͂̑͐͐̑ͧͨ̊͆̑̄ͫ͆͋ͩ͂̚̕͢͡ p̸̧̟̩̩̣̙̫̭̩̣͇͕̭͙̼̼̪̅ͯͨ̈́̆ͤ̅̌̓̿ͩ͗͑͐͋ͅi̬̠̘̖̎͐̄ͮͤ̅̃ͧ̾ͨ̆ͯ͒ͪ̇̏̐ͭ́͞ğ̷̸̸̪͙̣̂ͬ̈́̆͂̃͗ͩ͜͞g̷̯̱͚̖͈̦̲̖͚̖͖̠͕͛̓̊̓̾̈ͫͫ̔̇ͧ̈̚͘͘̕͠ŷ͕̻̖͖̙̬͈̭̰͓̦͖̦͍̩͈̗̳͂͂̑͐͐̑ͧͨ̊͆̑̄ͫ͆͋ͩ͂̚̕͢͡ p̸̧̟̩̩̣̙̫̭̩̣͇͕̭͙̼̼̪̅ͯͨ̈́̆ͤ̅̌̓̿ͩ͗͑͐͋ͅi̬̠̘̖̎͐̄ͮͤ̅̃ͧ̾ͨ̆ͯ͒ͪ̇̏̐ͭ́͞ğ̷̸̸̪͙̣̂ͬ̈́̆͂̃͗ͩ͜͞g̷̯̱͚̖͈̦̲̖͚̖͖̠͕͛̓̊̓̾̈ͫͫ̔̇ͧ̈̚͘͘̕͠ŷ͕̻̖͖̙̬͈̭̰͓̦͖̦͍̩͈̗̳͂͂̑͐͐̑ͧͨ̊͆̑̄ͫ͆͋ͩ͂̚̕͢͡ p̸̧̟̩̩̣̙̫̭̩̣͇͕̭͙̼̼̪̅ͯͨ̈́̆ͤ̅̌̓̿ͩ͗͑͐͋ͅi̬̠̘̖̎͐̄ͮͤ̅̃ͧ̾ͨ̆ͯ͒ͪ̇̏̐ͭ́͞ğ̷̸̸̪͙̣̂ͬ̈́̆͂̃͗ͩ͜͞g̷̯̱͚̖͈̦̲̖͚̖͖̠͕͛̓̊̓̾̈ͫͫ̔̇ͧ̈̚͘͘̕͠ŷ͕̻̖͖̙̬͈̭̰͓̦͖̦͍̩͈̗̳͂͂̑͐͐̑ͧͨ̊͆̑̄ͫ͆͋ͩ͂̚̕͢͡ p̸̧̟̩̩̣̙̫̭̩̣͇͕̭͙̼̼̪̅ͯͨ̈́̆ͤ̅̌̓̿ͩ͗͑͐͋ͅi̬̠̘̖̎͐̄ͮͤ̅̃ͧ̾ͨ̆ͯ͒ͪ̇̏̐ͭ́͞ğ̷̸̸̪͙̣̂ͬ̈́̆͂̃͗ͩ͜͞g̷̯̱͚̖͈̦̲̖͚̖͖̠͕͛̓̊̓̾̈ͫͫ̔̇ͧ̈̚͘͘̕͠ŷ͕̻̖͖̙̬͈̭̰͓̦͖̦͍̩͈̗̳͂͂̑͐͐̑ͧͨ̊͆̑̄ͫ͆͋ͩ͂̚̕͢͡ p̸̧̟̩̩̣̙̫̭̩̣͇͕̭͙̼̼̪̅ͯͨ̈́̆ͤ̅̌̓̿ͩ͗͑͐͋ͅi̬̠̘̖̎͐̄ͮͤ̅̃ͧ̾ͨ̆ͯ͒ͪ̇̏̐ͭ́͞ğ̷̸̸̪͙̣̂ͬ̈́̆͂̃͗ͩ͜͞g̷̯̱͚̖͈̦̲̖͚̖͖̠͕͛̓̊̓̾̈ͫͫ̔̇ͧ̈̚͘͘̕͠ŷ͕̻̖͖̙̬͈̭̰͓̦͖̦͍̩͈̗̳͂͂̑͐͐̑ͧͨ̊͆̑̄ͫ͆͋ͩ͂̚̕͢͡ p̸̧̟̩̩̣̙̫̭̩̣͇͕̭͙̼̼̪̅ͯͨ̈́̆ͤ̅̌̓̿ͩ͗͑͐͋ͅi̬̠̘̖̎͐̄ͮͤ̅̃ͧ̾ͨ̆ͯ͒ͪ̇̏̐ͭ́͞ğ̷̸̸̪͙̣̂ͬ̈́̆͂̃͗ͩ͜͞g̷̯̱͚̖͈̦̲̖͚̖͖̠͕͛̓̊̓̾̈ͫͫ̔̇ͧ̈̚͘͘̕͠ŷ͕̻̖͖̙̬͈̭̰͓̦͖̦͍̩͈̗̳͂͂̑͐͐̑ͧͨ̊͆̑̄ͫ͆͋ͩ͂̚̕͢͡ p̸̧̟̩̩̣̙̫̭̩̣͇͕̭͙̼̼̪̅ͯͨ̈́̆ͤ̅̌̓̿ͩ͗͑͐͋ͅi̬̠̘̖̎͐̄ͮͤ̅̃ͧ̾ͨ̆ͯ͒ͪ̇̏̐ͭ́͞ğ̷̸̸̪͙̣̂ͬ̈́̆͂̃͗ͩ͜͞g̷̯̱͚̖͈̦̲̖͚̖͖̠͕͛̓̊̓̾̈ͫͫ̔̇ͧ̈̚͘͘̕͠ŷ͕̻̖͖̙̬͈̭̰͓̦͖̦͍̩͈̗̳͂͂̑͐͐̑ͧͨ̊͆̑̄ͫ͆͋ͩ͂̚̕͢͡ p̸̧̟̩̩̣̙̫̭̩̣͇͕̭͙̼̼̪̅ͯͨ̈́̆ͤ̅̌̓̿ͩ͗͑͐͋ͅi̬̠̘̖̎͐̄ͮͤ̅̃ͧ̾ͨ̆ͯ͒ͪ̇̏̐ͭ́͞ğ̷̸̸̪͙̣̂ͬ̈́̆͂̃͗ͩ͜͞g̷̯̱͚̖͈̦̲̖͚̖͖̠͕͛̓̊̓̾̈ͫͫ̔̇ͧ̈̚͘͘̕͠ŷ͕̻̖͖̙̬͈̭̰͓̦͖̦͍̩͈̗̳͂͂̑͐͐̑ͧͨ̊͆̑̄ͫ͆͋ͩ͂̚̕͢͡ p̸̧̟̩̩̣̙̫̭̩̣͇͕̭͙̼̼̪̅ͯͨ̈́̆ͤ̅̌̓̿ͩ͗͑͐͋ͅi̬̠̘̖̎͐̄ͮͤ̅̃ͧ̾ͨ̆ͯ͒ͪ̇̏̐ͭ́͞ğ̷̸̸̪͙̣̂ͬ̈́̆͂̃͗ͩ͜͞g̷̯̱͚̖͈̦̲̖͚̖͖̠͕͛̓̊̓̾̈ͫͫ̔̇ͧ̈̚͘͘̕͠ŷ͕̻̖͖̙̬͈̭̰͓̦͖̦͍̩͈̗̳͂͂̑͐͐̑ͧͨ̊͆̑̄ͫ͆͋ͩ͂̚̕͢͡ p̸̧̟̩̩̣̙̫̭̩̣͇͕̭͙̼̼̪̅ͯͨ̈́̆ͤ̅̌̓̿ͩ͗͑͐͋ͅi̬̠̘̖̎͐̄ͮͤ̅̃ͧ̾ͨ̆ͯ͒ͪ̇̏̐ͭ́͞ğ̷̸̸̪͙̣̂ͬ̈́̆͂̃͗ͩ͜͞g̷̯̱͚̖͈̦̲̖͚̖͖̠͕͛̓̊̓̾̈ͫͫ̔̇ͧ̈̚͘͘̕͠ŷ͕̻̖͖̙̬͈̭̰͓̦͖̦͍̩͈̗̳͂͂̑͐͐̑ͧͨ̊͆̑̄ͫ͆͋ͩ͂̚̕͢͡