peking duck

y2021/p03.py

+from collections import Counter
+
+
+app = eps = ''
+for col in zip(*text.splitlines()):
+    n, *_, m = Counter(col).most_common()
+    app += n[0]
+    eps += m[0]
+ans1 = int(app, 2) * int(eps, 2)
+
+nums = text.splitlines()
+xs = nums[:]
+ys = nums[:]
+for idx in range(len(nums[0])):
+    n, _ = Counter(sorted([x[idx] for x in xs])).most_common()[::-1][0]
+    xs = [x for x in xs if x[idx] == n]
+    m, _ = Counter(sorted([y[idx] for y in ys])).most_common()[::-1][-1]
+    ys = [y for y in ys if y[idx] == m]
+ans2 = int(xs[0], 2) * int(ys[0], 2)