for each v1 in S1
if( solution(v1) ){ exit(0); } for each v2 in S2 if( solution(v1,v2) ){ exit(0); } for each v3 in S3 ..... |
algorithm search(k,n)
if( k > n ){ exit(1); } for each vk in Sk{ if( solution(v1,...,vk) ){ exit(0); } search( k+1, n ) } } |
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