So, I posted this code (a bit messy because its after a few fixes) to round
2, and I got WA. according to the analysis, my idea is right, but I still
got WA.
Can anyone spot why, or should I try and ask for a second look from the
codejam team?
I tried many local tests and I couldn't find anything wrong
def main():
N = int(input())
holes = []
for i in range(N):
a = [int(x) for x in input().split()]
holes.append(tuple(a))
if N <= 4:
return N
slants = {}
actual_lines = {}
for cur_hole in holes:
for j in holes:
if j == cur_hole:
continue
if cur_hole[0] == j[0]:
slant = 'inf'
else:
slant = float(cur_hole[1] - j[1]) / float(cur_hole[0] -
j[0])
slants.setdefault(slant, [set(), 2])
slants[slant][0].add(cur_hole)
slants[slant][0].add(j)
if slant == 'inf':
y = cur_hole[0]
else:
y = cur_hole[1] - slant * cur_hole[0]
yy = (slant, y)
#actual_lines.setdefault(yy, set([]))
#actual_lines[yy].add(cur_hole)
#actual_lines[yy].add(j)
#for i in actual_lines:
# if len(actual_lines[i]) % 2:
# slants[i[0]][1] ^= 3
a = slants[max(slants, key=lambda x: len(slants[x][0]) +
(len(slants[x][0])%2==0))]
a = len(a[0]) + (len(a[0])%2==0)
return min(N, max(a+1,4))
num_of_cases = [int(x) for x in input().split()][0]
for p in range(num_of_cases):
output = main()
print("Case #{0}: {1}".format(p + 1, output))
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