text: str

with open("input.txt") as f:
    text = f.read()

total: int  = 0

lines = [[c for c in line] for line in text.splitlines()]

roots: set[int] = set()
roots.add(len(lines[0]) // 2)

for i, line in enumerate(lines):
    for j, c in enumerate(line):
        if (c == '^' and j in roots):
            roots.remove(j)
            roots.add(j - 1)
            roots.add(j + 1)
            total += 1
# debug print()
    for root in roots:
        line[root] = "|"

for line in lines:
    print("".join(line))

print(total)