Solve ivanr3d.com/projects/pi

Author: IsaacG

ivanr3d.pi/2024.py

@@ -0,0 +1,22 @@
+import itertools
+import string
+
+encoded = "Wii kxtszof ova fsegyrpm d lnsrjkujvq roj! Kdaxii svw vnwhj pvugho buynkx tn vwh-gsvw ruzqia. Mrq'x kxtmjw bx fhlhlujw cjoq! Hmg tyhfa gx dwd fdqu bsm osynbn oulfrex, kahs con vjpmd qtjv bx whwxssp cti hmulkudui yqg f Miywh Sj Efh!"
+pi = "3141592653589793"
+
+out = ""
+for letter, shift in zip(encoded.lower(), itertools.cycle(pi)):
+    if letter.isalpha():
+        out += string.ascii_lowercase[(string.ascii_lowercase.index(letter.lower()) + 26 - int(shift)) % 26]
+    else:
+        out += letter
+print(out)
+
+numbers = "zero one two three four five size seven eight nine ten".split()
+result = 1
+out = "".join(i for i in out if i.isalpha())
+for i in range(len(out)):
+    for idx, num in enumerate(numbers):
+        if out[i:].startswith(num):
+            result *= idx
+print(result)

ivanr3d.pi/2025.py

@@ -0,0 +1,105 @@
+import string
+
+
+def solve(pi, data):
+    # 32 digits of pi.
+    digits = str(pi).replace(".", "")[:32]
+
+    # Find entries with a price which is in pi.
+    corrupt = []
+    for line in data.splitlines()[1:]:
+        day, price, ticker = line.split()
+        if price.replace(".", "") in digits:
+            corrupt.append((int(day), float(price), ticker))
+
+    # Part one. Collect correupt prices.
+    val = corrupt[0][1]
+    for day, price, ticker in corrupt:
+        if day % 2 == 0:
+            val *= price
+        else:
+            val /= price
+
+    val = int(str(val).replace(".", ""))
+    print(str(val)[:10])
+
+    # Part two.
+
+    # Map ticker to day and price for lookups.
+    tick_prices = {}
+    for line in data.splitlines()[1:]:
+        day, price, ticker = line.split()
+        tick_prices[ticker] = (int(day), int(str(price).replace(".", "")))
+    # Load the cipher_map into a list.
+    cipher_map = [i for line in CIPHER_MAP_TXT.splitlines() for i in line.split()]
+
+    phrase = []
+    for day, price, ticker in corrupt:
+        shift = int(str(price).replace(".", ""))
+        other_ticker = "".join(
+            string.ascii_uppercase[(string.ascii_uppercase.index(i) + shift) % 26]
+            for i in ticker
+        )
+        other_day, other_price = tick_prices[other_ticker]
+        letter = cipher_map[other_price % 256]
+        phrase.append((other_day, letter))
+    print("".join(i for _, i in sorted(phrase)))
+
+
+DATA = """\
+Day          Price ($)          Ticker
+1            150.00             TLM
+2            93.23              PIH
+3            300.50             MTH
+4            420.75             IUV
+5            3.14               GST
+6            720.20             FKE
+7            12.57              KVW
+8            88.90              TEC
+9            210.00             OIL
+10           2.64               PHI
+11           45.60              CUV
+12           33.83              SPI
+13           999.99             MEME
+14           28.27              MED
+15           123.45             BIA
+16           65.80              REN
+17           6.53               HST
+18           250.00             AND
+19           18.85              YVO
+20           33.33              XOR
+21           8.46               NUM
+22           777.77             POT
+23           9.42               BNO
+24           199.99             NOT
+25           15.92              SPI
+26           850.00             VSL
+27           19.94              IVA
+28           58.97              GST
+29           27.95              PHI
+30           21.99              EXW
+"""
+
+CIPHER_MAP_TXT = """\
+X J P Z Q T M C A O W Y B G D A
+N F R S H V K U E X J P Z Q T M
+C L O W Y B G D A N F R S H V K
+G E X J P Z Q T M P L O W Y B G
+D A N F R S H V K U E X J P Z Q
+T M A L O W Y B G D A O F I S H
+A K U E X J P Z Q T M C L O W Y
+O G D A N F R S H V K U E X J P
+Y Q T M C L O W Y B G D A N F R
+S H V K U E X Y G Z Q T M C L O
+D Y B G D A N F R S H V K U D X
+J P Z Q T M C L O W Y B G D A N
+F R S H V K U E X J P Z Q T M C
+D O W Y B G D A N F R S H V K U
+E X J P Z Q T M C O O W Y B G D
+A N F R S H V K U E X J P Z Q T"""
+
+
+if __name__ == "__main__":
+    solve("314159265358979323846264338327950288419716939937510", DATA)
+
+