题解 | #小红炸砖块#

import sys
lists = []
for line in sys.stdin:
    a = line.split()
    b = [int(i) for i in a]
    lists.append(b)

table = [['*' for _ in range(lists[0][1])] for _ in range(lists[0][0])]

for i in lists[1:]:
    for n in range(i[0]):
        if table[n][i[1]-1]=='.':
            pass
        else:
            table[n][i[1]-1]='.'
            break
for list in table:
    print(''.join(list))