day 2 ivy solution

day02/sol.ivy

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+) get "input.ivy"
+
+test = 3 2 rho "AYBXCZ"
+
+op inc a = 1 + a
+op dec a = -1 + a
+
+# returns the outcome for the first player (-1 = lose, 0=draw, +1 = win)
+# of a round of rps (1-3 = rock, paper, scissors)
+op a rps b = dec (inc a - b) mod 3
+
+op tonum a = ("ABC" iota a) + ("XYZ" iota a)
+
+# converts an outcome into a score
+op score outcome =
+    3 + 3 * outcome
+
+# scores a round of rps for the first player
+op a score b =
+    outcome = a rps b
+    a + score outcome
+
+op parta x =
+    x = transp tonum x
+    +/ x[2] score x[1]
+
+op partb x =
+    x = tonum transp x
+    a = x[1]
+    outcome = -2 + x[2]
+    b = inc (dec a + outcome) mod 3
+    +/ b score a
+
+parta test
+parta input
+
+partb test
+partb input

day02/sol.py

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+scores = {
+    "A X": 1+3,
+    "B X": 1+0,
+    "C X": 1+6,
+    "A Y": 2+6,
+    "B Y": 2+3,
+    "C Y": 2+0,
+    "A Z": 3+0,
+    "B Z": 3+6,
+    "C Z": 3+3,
+}
+
+
+
+t = 0
+with open("input") as f:
+    for game in f:
+        t += scores[game.strip()]
+
+print(t)
+
+t2 = 0
+with open("input") as f:
+    for game in f:
+        you, me = game.split()
+        a="ABC".index(you)
+        b="YZX".index(me)
+        play = 1+(a+b)%3
+        outcome = (b+1)%3
+        t2 += play + outcome*3
+
+print(t2)

day02/test

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+A Y
+B X
+C Z

day02/toivy.py

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+data = []
+n = 0
+with open("input") as f:
+    for line in f:
+        for x in line.split():
+            data.append(x)
+        n += 1
+
+print('input = {} {} rho "{}"'.format(n, 2, ''.join(data)))