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Before contest
Codeforces Round 973 (Div. 2)
13:26:11
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Difficulty:
—
trees
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Problems
#
Name
70E
Information Reform
dp
,
implementation
,
trees
2700
x491
61E
Enemy is weak
data structures
,
trees
1900
x10881
61D
Eternal Victory
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
1800
x6517
51F
Caterpillar
dfs and similar
,
dp
,
graphs
,
trees
2800
x566
48G
Galaxy Union
dp
,
trees
,
two pointers
2700
x266
42E
Baldman and the military
dfs and similar
,
graphs
,
trees
2700
x202
37C
Old Berland Language
data structures
,
greedy
,
trees
1900
x1661
29D
Ant on the Tree
constructive algorithms
,
dfs and similar
,
trees
2000
x2444
25D
Roads not only in Berland
dsu
,
graphs
,
trees
1900
x11128
22E
Scheme
dfs and similar
,
graphs
,
trees
2300
x1617
14D
Two Paths
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
,
two pointers
1900
x4487
6E
Exposition
binary search
,
data structures
,
dsu
,
trees
,
two pointers
1900
x3266
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