https://open.kattis.com/contests/jrjjf7
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https://open.kattis.com/contests/p4a5rt
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https://open.kattis.com/contests/ho8dk5
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https://open.kattis.com/contests/qpnqwa
https://open.kattis.com/contests/qzmrbn
https://open.kattis.com/contests/khsj3j
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https://open.kattis.com/contests/huzq5g
https://open.kattis.com/contests/huzq5g
https://open.kattis.com/contests/ads2d5
https://open.kattis.com/contests/f7grwf