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li submitted a Comment to Problem 247. Arrange Vector in descending order

it is a good problem,but I cann't solve it

on 22 Jul 2013

li liked Problem 12. Fibonacci sequence

on 18 Jul 2013

li received Promoter badge for Problem 12. Fibonacci sequence

on 18 Jul 2013

li submitted Solution 284345 to Problem 106. Weighted average

on 18 Jul 2013

li submitted Solution 284344 to Problem 106. Weighted average

on 18 Jul 2013

li submitted Solution 284306 to Problem 167. Pizza!

on 18 Jul 2013

li submitted Solution 284305 to Problem 167. Pizza!

on 18 Jul 2013

li submitted Solution 278399 to Problem 7. Column Removal

on 11 Jul 2013

li submitted Solution 275398 to Problem 5. Triangle Numbers

on 8 Jul 2013

li received Commenter badge for Solution 272095

on 8 Jul 2013

li submitted a Comment to Solution 272095

what's the "str2num" mean?

on 8 Jul 2013

li submitted Solution 275365 to Problem 8. Add two numbers

on 8 Jul 2013

li received Solver badge for Solution 275357

on 8 Jul 2013