[Python/2019] Restructure solutions

Python/2019/23.py

@@ -0,0 +1,123 @@
+from lib import *
+
+input = read_input(2019, 23)
+
+
+class IntCode:
+    def __init__(self, mem):
+        self.mem = {i: e for i, e in enumerate(mem)}
+        self.pc = 0
+        self.running = False
+        self.inp = []
+        self.out = []
+        self.rel = 0
+
+    def start(self):
+        self.running = True
+        self.cont()
+
+    def get_arg(self, i):
+        mode = self.mem[self.pc] // (10 ** (i + 1)) % 10
+        out = self.mem[self.pc + i]
+        if mode == 1:
+            return out
+        elif mode == 2:
+            out += self.rel
+        return self.mem.get(out, 0)
+
+    def write_arg(self, i, value):
+        mode = self.mem[self.pc] // (10 ** (i + 1)) % 10
+        pos = self.mem[self.pc + i]
+        assert mode != 1
+        if mode == 2:
+            pos += self.rel
+        self.mem[pos] = value
+
+    def cont(self):
+        while True:
+            opcode = self.mem[self.pc] % 100
+
+            if opcode == 1:
+                self.write_arg(3, self.get_arg(1) + self.get_arg(2))
+                self.pc += 4
+            elif opcode == 2:
+                self.write_arg(3, self.get_arg(1) * self.get_arg(2))
+                self.pc += 4
+            elif opcode == 3:
+                if not self.inp:
+                    return
+                self.write_arg(1, self.inp.pop(0))
+                self.pc += 2
+            elif opcode == 4:
+                self.out.append(self.get_arg(1))
+                self.pc += 2
+            elif opcode == 5:
+                if self.get_arg(1):
+                    self.pc = self.get_arg(2)
+                else:
+                    self.pc += 3
+            elif opcode == 6:
+                if not self.get_arg(1):
+                    self.pc = self.get_arg(2)
+                else:
+                    self.pc += 3
+            elif opcode == 7:
+                self.write_arg(3, int(self.get_arg(1) < self.get_arg(2)))
+                self.pc += 4
+            elif opcode == 8:
+                self.write_arg(3, int(self.get_arg(1) == self.get_arg(2)))
+                self.pc += 4
+            elif opcode == 9:
+                self.rel += self.get_arg(1)
+                self.pc += 2
+            elif opcode == 99:
+                self.running = False
+                return
+
+
+(*mem,) = map(int, input.split(","))
+nodes = [IntCode(mem) for _ in range(50)]
+for i, node in enumerate(nodes):
+    node.inp.append(i)
+    node.start()
+while True:
+    for i, node in enumerate(nodes):
+        while node.out:
+            dest, x, y, *node.out = node.out
+            if dest == 255:
+                print(y)
+                exit()
+            nodes[dest].inp += [x, y]
+        node.inp.append(-1)
+        node.cont()
+
+
+(*mem,) = map(int, input.split(","))
+nodes = [IntCode(mem) for _ in range(50)]
+nat = None
+nat_history = set()
+for i, node in enumerate(nodes):
+    node.inp.append(i)
+    node.start()
+while True:
+    idle = True
+    for i, node in enumerate(nodes):
+        while node.out:
+            idle = False
+            dest, x, y, *node.out = node.out
+            if dest == 255:
+                nat = x, y
+            else:
+                nodes[dest].inp += [x, y]
+        if not node.inp:
+            node.inp.append(-1)
+        else:
+            idle = False
+        node.cont()
+    if idle and nat:
+        x, y = nat
+        nodes[0].inp += [x, y]
+        if y in nat_history:
+            print(y)
+            exit()
+        nat_history.add(y)