Problems from Southwestern Europe Regional Contest (SWERC) 2011

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Name	Fastest	Shortest	Authors	Full Solves	Ratio	Difficulty	Languages
Distributing Ballot Boxes	0.04	181	2333	1907	82%	3.6Medium	en
Guess the Numbers	0.01	357	236	123	52%	7.8Hard	en
Non-negative Partial Sums	0.04	420	175	112	64%	6.7Hard	en
Remoteland	0.13	644	80	63	79%	4.8Medium	en