2020/5

y2020/p05.py

+import sys
+
+
+sids = []
+for line in sys.stdin.read().splitlines():
+    rows = list(range(1, 128))
+    for char in line[:7]:
+        rows = [rows[:len(rows)//2], rows[len(rows)//2:]]['FB'.index(char)]
+    row, = rows
+
+    cols = list(range(8))
+    for char in line[7:]:
+        cols = [cols[:len(cols)//2], cols[len(cols)//2:]]['LR'.index(char)]
+    col, = cols
+
+    sids.append(row * 8 + col)
+
+ans1 = max(sids)
+ans2, = set(range(min(sids), max(sids) + 1)).difference(sids)
+
+print(ans1)
+print(ans2)