Day 4

aoc4-1.py

+class Board:
+    def __init__(self, lines, boardsize=None, boardnum=None):
+        self.lines = [[el for el in line.split(" ") if el != ""] for line in lines]
+        self.boardsize = 5 if boardsize == None else boardsize
+        self.boardnum = 0 if boardnum == None else boardnum
+        self.marks = []
+        for _ in range(self.boardsize):
+            self.marks.append([0]*self.boardsize)
+
+    def mark(self, digit):
+        import pdb
+        # if self.boardnum == 1:
+        #     pdb.set_trace()
+        for i, line in enumerate(self.lines):
+            if digit in line:
+                y = i
+                x = line.index(digit)
+                self.marks[y][x] = 1
+                return None
+
+    def check(self):
+        for line in self.marks:
+            if sum(line) == 5:
+                return True
+        for i in range(5):
+            if  self.marks[0][i] == 1 and \
+                self.marks[1][i] == 1 and \
+                self.marks[2][i] == 1 and \
+                self.marks[3][i] == 1 and \
+                self.marks[4][i] == 1:
+                return True
+        return False
+
+    def sum_unmarked(self):
+        total = 0
+        for i in range(self.boardsize):
+            for j in range(self.boardsize):
+                if self.marks[j][i] == 0:
+                    total += int(self.lines[j][i])
+        return total
+
+    def __repr__(self):
+        outstr = f"Board {self.boardnum}:\n"
+        for i in range(self.boardsize):
+            outstr += f"{' '.join([str(el).rjust(2) for el in self.lines[i]])}   {' '.join([str(el).rjust(2) for el in self.marks[i]])}\n"
+        return outstr
+
+    def __str__(self):
+        outstr = f"Board {self.boardnum}:\n"
+        for i in range(self.boardsize):
+            outstr += f"{' '.join([str(el).rjust(2) for el in self.lines[i]])}   {' '.join([str(el).rjust(2) for el in self.marks[i]])}\n"
+        return outstr
+
+
+def main():
+    with open("aoc4-1.txt", "r") as file:
+        lines = [line.strip() for line in file.readlines()]
+    firstline = lines[0].split(",")
+    lines = lines[2:]
+    i = 0
+    j = 0
+    boards = []
+    while i < len(lines):
+        boards.append(Board(lines[i:i+5], boardnum=j))
+        j += 1
+        i += 6
+    for el in firstline:
+        print(el)
+        for i, board in enumerate(boards):
+            board.mark(el)
+            if board.check():
+                return (board, int(el) * board.sum_unmarked())
+
+if __name__ == "__main__":
+    board, total = main()
+    print(board)
+    print(total)

aoc4-2.py

+class Board:
+    def __init__(self, lines, boardsize=None, boardnum=None):
+        self.lines = [[el for el in line.split(" ") if el != ""] for line in lines]
+        self.boardsize = 5 if boardsize == None else boardsize
+        self.boardnum = 0 if boardnum == None else boardnum
+        self.marks = []
+        for _ in range(self.boardsize):
+            self.marks.append([0]*self.boardsize)
+
+    def mark(self, digit):
+        import pdb
+        # if self.boardnum == 1:
+        #     pdb.set_trace()
+        for i, line in enumerate(self.lines):
+            if digit in line:
+                y = i
+                x = line.index(digit)
+                self.marks[y][x] = 1
+                return None
+
+    def check(self):
+        for line in self.marks:
+            if sum(line) == 5:
+                return True
+        for i in range(5):
+            if  self.marks[0][i] == 1 and \
+                self.marks[1][i] == 1 and \
+                self.marks[2][i] == 1 and \
+                self.marks[3][i] == 1 and \
+                self.marks[4][i] == 1:
+                return True
+        return False
+
+    def sum_unmarked(self):
+        total = 0
+        for i in range(self.boardsize):
+            for j in range(self.boardsize):
+                if self.marks[j][i] == 0:
+                    total += int(self.lines[j][i])
+        return total
+
+    def __repr__(self):
+        outstr = f"Board {self.boardnum}:\n"
+        for i in range(self.boardsize):
+            outstr += f"{' '.join([str(el).rjust(2) for el in self.lines[i]])}   {' '.join([str(el).rjust(2) for el in self.marks[i]])}\n"
+        return outstr
+
+    def __str__(self):
+        outstr = f"Board {self.boardnum}:\n"
+        for i in range(self.boardsize):
+            outstr += f"{' '.join([str(el).rjust(2) for el in self.lines[i]])}   {' '.join([str(el).rjust(2) for el in self.marks[i]])}\n"
+        return outstr
+
+
+def main():
+    with open("aoc4-1.txt", "r") as file:
+        lines = [line.strip() for line in file.readlines()]
+    firstline = lines[0].split(",")
+    lines = lines[2:]
+    i = 0
+    j = 0
+    boards = []
+    while i < len(lines):
+        boards.append(Board(lines[i:i+5], boardnum=j))
+        j += 1
+        i += 6
+    for el in firstline:
+        print(el)
+        is_to_pop = []
+        for i, board in enumerate(boards):
+            board.mark(el)
+            if board.check():
+                if len(boards) > 1:
+                    is_to_pop.append(i)
+                else:
+                    return (board, int(el) * board.sum_unmarked())
+        boards = [board for i, board in enumerate(boards) if i not in is_to_pop]
+
+if __name__ == "__main__":
+    board, total = main()
+    print(board)
+    print(total)