Problems

brute force number theory

implementation

dp strings

binary search dp sortings +1

greedy math

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greedy math

dp math

binary search data structures flows +1

combinatorics dp dsu +3

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data structures dsu graphs +3

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constructive algorithms

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constructive algorithms

flows graph matchings graphs

constructive algorithms dfs and similar interactive +2

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implementation strings

*special combinatorics dp +2

*special data structures dfs and similar +2

*special 2-sat binary search +5

*special combinatorics dfs and similar +5

*special geometry sortings

*special data structures dsu +3

binary search bitmasks data structures

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dfs and similar dp greedy +5

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bitmasks brute force combinatorics +4

brute force dfs and similar dp +2

data structures divide and conquer dp +1

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