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# Author Problem Lang Verdict Time Memory Sent Judged  
155175007 Practice:
quangltfsc0378 		1567B - 36 PyPy 3 Accepted 280 ms 9560 KB 2022-04-28 08:01:06 2022-04-28 08:01:07
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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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