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Codeforces
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Codeforces Round 424 (Div. 1, rated, based on VK Cup Finals)
2017/07/13 23:05
120 分钟
830
Codeforces
A
Office Keys
Office Keys
1800
仅原文
B
Cards Sorting
Cards Sorting
1600
仅原文
C
Bamboo Partition
Bamboo Partition
2300
仅原文
D
Singer House
Singer House
2800
仅原文
E
Perpetual Motion Machine
Perpetual Motion Machine
3100
仅原文