The trap is what happens after the inner loop. 𝗯𝗿𝗲𝗮𝗸 → exits the inner loop only → execution still hits return i → you can return a partial match (wrong index) 𝗰𝗼𝗻𝘁𝗶𝗻𝘂𝗲 𝗼𝘂𝘁𝗲𝗿 → skips ...

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This story appears in the June 2009 issue of National Geographic magazine. The world economy in the ninth century had two powerful engines. One was Tang dynasty China, an empire stretching from the ...