Each of those submission scores exactly: 16331.003 and shares time/memory usage

when (UTC)	handle	        ms	mem     link
08-19 10:10	mojo__hugo	500	400 KB	387664604
08-20 03:39	Lao_mang	500	400 KB	387745570
08-19 11:25	mojo__hugo	437	400 KB	387672276
08-19 17:22	Lao_mang	437	400 KB	387712808
08-20 01:53	Lao_mang	437	300 KB	387740311

mojo__hugo and Lao_mang are from the Guangzhou University. Both participants are in top15 on pretests (top 10 and top13 accordingly) and expected to win 3000 euro each.

Treat this post as call to action. Call to investigate those solutions carefully, before posting final results. This is not direct cheating accusation

Cheating in the contests with such high monetary prices should not be tolerated.