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# Problem Tags Rating Solved
903-A Hungry Student Problem
greedy implementation
900
902-B Coloring a Tree
dfs and similar dsu greedy
1200
902-A Visiting a Friend
greedy implementation
1100
901-E Cyclic Cipher
fft math
3300
901-D Weighting a Tree
constructive algorithms dfs and similar graphs
2700
901-C Bipartite Segments
binary search data structures dfs and similar +3
2300
901-B GCD of Polynomials
constructive algorithms math
2200
901-A Hashing Trees
constructive algorithms trees
1500
900-E Maximum Questions
data structures dp strings
2100
900-D Unusual Sequences
bitmasks combinatorics dp +2
2000
900-C Remove Extra One
brute force data structures math
1700
900-B Position in Fraction
math number theory
1300
900-A Find Extra One
geometry implementation
800
899-F Letters Removing
data structures strings
2100
899-E Segments Removal
data structures dsu flows +2
2000
899-D Shovel Sale
constructive algorithms math
1800
899-C Dividing the numbers
constructive algorithms graphs math
1300
899-B Months and Years
implementation
1200
899-A Splitting in Teams
constructive algorithms greedy math
800
898-F Restoring the Expression
brute force hashing math
2300
898-E Squares and not squares
constructive algorithms greedy
1600
898-D Alarm Clock
greedy
1600
898-C Phone Numbers
implementation strings
1400
898-B Proper Nutrition
brute force implementation number theory
1100
898-A Rounding
implementation math
800
897-B Chtholly's request
brute force
1300
897-A Scarborough Fair
implementation
800
896-E Welcome home, Chtholly
data structures dsu
3100
896-D Nephren Runs a Cinema
chinese remainder theorem combinatorics math +1
2900
896-C Willem, Chtholly and Seniorious
data structures probabilities
2600
896-B Ithea Plays With Chtholly
binary search constructive algorithms games +2
2000
896-A Nephren gives a riddle
binary search dfs and similar
1700
895-E Eyes Closed
data structures probabilities
2300
895-D String Mark
combinatorics math strings
2100
895-C Square Subsets
bitmasks combinatorics dp +1
2000
895-B XK Segments
binary search math sortings +1
1700
895-A Pizza Separation
brute force implementation
1200
894-E Ralph and Mushrooms
dp graphs
2100
894-D Ralph And His Tour in Binary Country
brute force data structures trees
2200
894-C Marco and GCD Sequence
constructive algorithms math
1900
894-B Ralph And His Magic Field
combinatorics constructive algorithms math +1
1800
894-A QAQ
brute force dp
800
893-F Subtree Minimum Query
data structures trees
2300
893-E Counting Arrays
combinatorics dp math +1
2000
893-D Credit Card
data structures dp greedy +1
1900
893-C Rumor
dfs and similar graphs greedy
1300
893-B Beautiful Divisors
brute force implementation
1000
893-A Chess For Three
implementation
900
892-B Wrath
greedy implementation two pointers
1200
892-A Greed
greedy implementation
900