684 B | 684 chars
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
BLANK = " "
inp = input
# inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = BLANK : [*map(int,inp().split(x))]
mfi = lambda x = BLANK : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def dis(a, b):
return abs(a[0] - b[0]) + abs(a[1] - b[1])
def solve():
n = ii()
a = ii()
b = ii()
center = (n // 2, n // 2)
for i in range(n):
for j in range(n):
if a <= dis(center, (i, j)) <= b:
p(end="*")
else:
p(end=".")
p()
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()