import sys
from collections import defaultdict
cmds = open("input").read().split("$")

cwd = []
sizes = defaultdict(lambda: 0)
for cmd in cmds:
    cmd = cmd.strip()
    if not cmd:
        continue
    print(cmd)
    if cmd.startswith("cd "):
        dir = cmd.split()[1]
        if dir == "..":
            cwd.pop()
        elif dir == "/":
            cwd = []
        else:
            cwd.append(dir)
    elif cmd.startswith("ls\n"):
        files = cmd.splitlines()[1:]
        for file in files:
            sz, name = file.split()
            if sz == 'dir':
                pass
            else:
                print(cwd, name, sizes)
                for i in range(len(cwd)+1):
                    sizes['/'.join(cwd[:i])] += int(sz)
    else:
        print("bad command:" +cmd)


print(sizes)

print(sum(sz for sz in sizes.values() if sz <= 100000))

print(min(sz for sz in sizes.values() if 70000000 - sizes[''] + sz >= 30000000))