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Task/Binary-search/Axe/binary-search.axe

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+Lbl BSEARCH
+0→L
+r₃-1→H
+While L≤H
+ (L+H)/2→M
+ If {L+M}>r₂
+  M-1→H
+ ElseIf {L+M}<r₂
+  M+1→L
+ Else
+  M
+  Return
+ End
+End
+-1
+Return