class MemoryManager:
    def __init__(self, n, t):
        self.n = n
        self.t = t
        self.blocks = {}
        self.free_blocks = set(range(1, n + 1))

    def allocate_block(self, time):
        block = min(self.free_blocks)
        self.free_blocks.remove(block)
        self.blocks[block] = time + self.t
        return block

    def access_block(self, time, block_no):
        if block_no in self.blocks and self.blocks[block_no] >= time:
            return '+'
        else:
            return '-'

n = 30000
t = 10
memory_manager = MemoryManager(n, t)

queries = input().strip()

for query in queries:
    query_type = query[0]
    time = query[1]
    if query_type == '+':
        print(memory_manager.allocate_block(time))
    elif query_type == '.':
        block_no = query[2]
        print(memory_manager.access_block(time, block_no))