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Copy path15_medium_[two_pointer]_3sum.py
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15_medium_[two_pointer]_3sum.py
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from typing import List
from collections import defaultdict
class Solution:
def threeSum(self, nums: List[int]) -> List[List[int]]:
num_count_cache = defaultdict(int)
hash_answer_set = {}
answer = []
nums.sort()
for num in nums:
num_count_cache[num] += 1
for i in range(len(nums)):
if nums[i]>0:
break
if i > 0 and nums[i-1] == nums[i]:
continue
for j in range(i+1, len(nums)):
n1, n2 = nums[i], nums[j]
n_sum = n1 + n2
if n_sum > 0:
continue
n3 = -n_sum
num_count_cache[n1] -= 1
num_count_cache[n2] -= 1
if num_count_cache[n3] > 0:
num_count_cache[n1] += 1
num_count_cache[n2] += 1
if hash_answer_set.get(f"{n1}_{n2}_{n3}"):
continue
if hash_answer_set.get(f"{n1}_{n3}_{n2}"):
continue
if hash_answer_set.get(f"{n3}_{n1}_{n2}"):
continue
if n3 >= n1 and n3 >= n2:
hash_answer_set[f"{n1}_{n2}_{n3}"] = True
answer.append([n1, n2, n3])
elif n3 >= n1:
hash_answer_set[f"{n1}_{n3}_{n2}"] = True
answer.append([n1, n3, n2])
else:
hash_answer_set[f"{n3}_{n1}_{n2}"] = True
answer.append([n3, n1, n2])
else:
num_count_cache[n1] += 1
num_count_cache[n2] += 1
return answer
# class Solution(object):
# def threeSum(self, nums):
# res = []
# nums.sort()
# length = len(nums)
# for i in range(length-2): #[8]
# if nums[i]>0: break #[7]
# if i>0 and nums[i]==nums[i-1]: continue #[1]
# l, r = i+1, length-1 #[2]
# while l<r:
# total = nums[i]+nums[l]+nums[r]
# if total<0: #[3]
# l+=1
# elif total>0: #[4]
# r-=1
# else: #[5]
# res.append([nums[i], nums[l], nums[r]])
# while l<r and nums[l]==nums[l+1]: #[6]
# l+=1
# while l<r and nums[r]==nums[r-1]: #[6]
# r-=1
# l+=1
# r-=1
# return res
if __name__ == '__main__':
print(Solution().threeSum([-1, 0, 1, 2, -1, -4]))
print(Solution().threeSum([82597,-9243,62390,83030,-97960,-26521,-61011,83390,-38677,12333,75987,46091,83794,19355,-71037,-6242,-28801,324,1202,-90885,-2989,-95597,-34333,35528,5680,89093,-90606,50360,-29393,-27012,53313,65213,99818,-82405,-41661,-3333,-51952,72135,-1523,26377,74685,96992,92263,15929,5467,-99555,-43348,-41689,-60383,-3990,32165,65265,-72973,-58372,12741,-48568,-46596,72419,-1859,34153,62937,81310,-61823,-96770,-54944,8845,-91184,24208,-29078,31495,65258,14198,85395,70506,-40908,56740,-12228,-40072,32429,93001,68445,-73927,25731,-91859,-24150,10093,-60271,-81683,-18126,51055,48189,-6468,25057,81194,-58628,74042,66158,-14452,-49851,-43667,11092,39189,-17025,-79173,13606,83172,92647,-59741,19343,-26644,-57607,82908,-20655,1637,80060,98994,39331,-31274,-61523,91225,-72953,13211,-75116,-98421,-41571,-69074,99587,39345,42151,-2460,98236,15690,-52507,-95803,-48935,-46492,-45606,-79254,-99851,52533,73486,39948,-7240,71815,-585,-96252,90990,-93815,93340,-71848,58733,-14859,-83082,-75794,-82082,-24871,-15206,91207,-56469,-93618,67131,-8682,75719,87429,-98757,-7535,-24890,-94160,85003,33928,75538,97456,-66424,-60074,-8527,-28697,-22308,2246,-70134,-82319,-10184,87081,-34949,-28645,-47352,-83966,-60418,-15293,-53067,-25921,55172,75064,95859,48049,34311,-86931,-38586,33686,-36714,96922,76713,-22165,-80585,-34503,-44516,39217,-28457,47227,-94036,43457,24626,-87359,26898,-70819,30528,-32397,-69486,84912,-1187,-98986,-32958,4280,-79129,-65604,9344,58964,50584,71128,-55480,24986,15086,-62360,-42977,-49482,-77256,-36895,-74818,20,3063,-49426,28152,-97329,6086,86035,-88743,35241,44249,19927,-10660,89404,24179,-26621,-6511,57745,-28750,96340,-97160,-97822,-49979,52307,79462,94273,-24808,77104,9255,-83057,77655,21361,55956,-9096,48599,-40490,-55107,2689,29608,20497,66834,-34678,23553,-81400,-66630,-96321,-34499,-12957,-20564,25610,-4322,-58462,20801,53700,71527,24669,-54534,57879,-3221,33636,3900,97832,-27688,-98715,5992,24520,-55401,-57613,-69926,57377,-77610,20123,52174,860,60429,-91994,-62403,-6218,-90610,-37263,-15052,62069,-96465,44254,89892,-3406,19121,-41842,-87783,-64125,-56120,73904,-22797,-58118,-4866,5356,75318,46119,21276,-19246,-9241,-97425,57333,-15802,93149,25689,-5532,95716,39209,-87672,-29470,-16324,-15331,27632,-39454,56530,-16000,29853,46475,78242,-46602,83192,-73440,-15816,50964,-36601,89758,38375,-40007,-36675,-94030,67576,46811,-64919,45595,76530,40398,35845,41791,67697,-30439,-82944,63115,33447,-36046,-50122,-34789,43003,-78947,-38763,-89210,32756,-20389,-31358,-90526,-81607,88741,86643,98422,47389,-75189,13091,95993,-15501,94260,-25584,-1483,-67261,-70753,25160,89614,-90620,-48542,83889,-12388,-9642,-37043,-67663,28794,-8801,13621,12241,55379,84290,21692,-95906,-85617,-17341,-63767,80183,-4942,-51478,30997,-13658,8838,17452,-82869,-39897,68449,31964,98158,-49489,62283,-62209,-92792,-59342,55146,-38533,20496,62667,62593,36095,-12470,5453,-50451,74716,-17902,3302,-16760,-71642,-34819,96459,-72860,21638,47342,-69897,-40180,44466,76496,84659,13848,-91600,-90887,-63742,-2156,-84981,-99280,94326,-33854,92029,-50811,98711,-36459,-75555,79110,-88164,-97397,-84217,97457,64387,30513,-53190,-83215,252,2344,-27177,-92945,-89010,82662,-11670,86069,53417,42702,97082,3695,-14530,-46334,17910,77999,28009,-12374,15498,-46941,97088,-35030,95040,92095,-59469,-24761,46491,67357,-66658,37446,-65130,-50416,99197,30925,27308,54122,-44719,12582,-99525,-38446,-69050,-22352,94757,-56062,33684,-40199,-46399,96842,-50881,-22380,-65021,40582,53623,-76034,77018,-97074,-84838,-22953,-74205,79715,-33920,-35794,-91369,73421,-82492,63680,-14915,-33295,37145,76852,-69442,60125,-74166,74308,-1900,-30195,-16267,-60781,-27760,5852,38917,25742,-3765,49097,-63541,98612,-92865,-30248,9612,-8798,53262,95781,-42278,-36529,7252,-27394,-5021,59178,80934,-48480,-75131,-54439,-19145,-48140,98457,-6601,-51616,-89730,78028,32083,-48904,16822,-81153,-8832,48720,-80728,-45133,-86647,-4259,-40453,2590,28613,50523,-4105,-27790,-74579,-17223,63721,33489,-47921,97628,-97691,-14782,-65644,18008,-93651,-71266,80990,-76732,-47104,35368,28632,59818,-86269,-89753,34557,-92230,-5933,-3487,-73557,-13174,-43981,-43630,-55171,30254,-83710,-99583,-13500,71787,5017,-25117,-78586,86941,-3251,-23867,-36315,75973,86272,-45575,77462,-98836,-10859,70168,-32971,-38739,-12761,93410,14014,-30706,-77356,-85965,-62316,63918,-59914,-64088,1591,-10957,38004,15129,-83602,-51791,34381,-89382,-26056,8942,5465,71458,-73805,-87445,-19921,-80784,69150,-34168,28301,-68955,18041,6059,82342,9947,39795,44047,-57313,48569,81936,-2863,-80932,32976,-86454,-84207,33033,32867,9104,-16580,-25727,80157,-70169,53741,86522,84651,68480,84018,61932,7332,-61322,-69663,76370,41206,12326,-34689,17016,82975,-23386,39417,72793,44774,-96259,3213,79952,29265,-61492,-49337,14162,65886,3342,-41622,-62659,-90402,-24751,88511,54739,-21383,-40161,-96610,-24944,-602,-76842,-21856,69964,43994,-15121,-85530,12718,13170,-13547,69222,62417,-75305,-81446,-38786,-52075,-23110,97681,-82800,-53178,11474,3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# print(Solution().threeSum([-4,-2,-2,-2,0,1,2,2,2,3,3,4,4,6,6]))