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# Author Problem Lang Verdict Time Memory Sent Judged  
127995921 Practice:
eugalt 		1567B - 35 Python 3 Accepted 202 ms 9244 KB 2021-09-05 23:38:16 2021-09-05 23:38:16
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for s in[*open(0)][1:]:a,b=map(int,s.split());x=(0,a-1,1,a)[a%4];print(a+(b!=x)+(b^x==a))
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