Monikulmio

def sign(a: int) -> int:
    """Palauttaa luvun etumerkin (-1, 0, 1)."""
    return (a > 0) - (a < 0)

# --- Syöte ---
n, m, k = map(int, input().split())
points = [tuple(map(lambda v: int(v) - 1, input().split())) for _ in range(k)]

# --- Alustetaan ruudukko ---
grid = [['.' for _ in range(m)] for _ in range(n)]

# --- Piirretään janat ja kärjet ---
for i in range(k):
    y1, x1 = points[i]
    y2, x2 = points[(i + 1) % k]
    dy, dx = sign(y2 - y1), sign(x2 - x1)
    y, x = y1, x1

    while True:
        # Kärkipiste
        if (y, x) in points:
            grid[y][x] = '*'
        else:
            # Valitaan merkki suunnan perusteella
            if dy == 0:
                ch = '='
            elif dx == 0:
                ch = '|'
            elif dy == dx:
                ch = '\\'
            else:
                ch = '/'
            grid[y][x] = ch

        if (y, x) == (y2, x2):
            break
        y += dy
        x += dx

# --- Täytetään sisäpuoli ---
# Käytetään parillisuus-sääntöä (even–odd rule)
for y in range(n):
    inside = False
    for x in range(m):
        c = grid[y][x]
        # Leikkaus reunaan
        if c in ['|', '/', '\\']:
            inside = not inside
        elif inside and c == '.':
            grid[y][x] = '#'

# --- Tulostus ---
for row in grid:
    print(''.join(row))

Test 1 (public)

Verdict: ACCEPTED

Test 2 (public)

Verdict: ACCEPTED

Test 3 (public)

Verdict: ACCEPTED

Test 4 (public)

Verdict: ACCEPTED

Test 5 (public)

Verdict: ACCEPTED

Test 6 (public)

Verdict: ACCEPTED

Test 7 (public)

Verdict: ACCEPTED

Test 8 (public)

Verdict: ACCEPTED

Test 9 (public)

Verdict: ACCEPTED

Test 10 (public)

Verdict: ACCEPTED