The editorial and problem setter's code is not clear to me. Can someone explain the code. I don't understand how he reduced O( n^2 ) to just O( n ) . Please explain this to me .
Thanks!
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| Rev. | Lang. | By | When | Δ | Comment | |
|---|---|---|---|---|---|---|
| en1 |
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I_love_Captain_America | 2015-08-30 13:48:03 | 213 | Initial revision (published) |
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