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What Now?

After completing this section on the USACO Guide, you should be comfortable with the topics that have historically appeared in the USACO Silver division. In order to maximize your chance at promoting, you should aim to practice by doing more problems.

Uncategorized Problems

Below we list some problems that we think are roughly Silver level but don't really fit in previous modules. The difficulties listed here are relative to the Silver division (difficulty is subjective and isn't always accurate though). Some of these problems appeared in a higher division, but can still be solved using only Silver-level topics. We'll be expanding this list as we get more problem suggestions.

StatusSourceProblem NameDifficultyTags
CSES
Range XOR Queries
Easy
Show TagsPrefix Sums
CF
Mixing Water
Easy
Show TagsBinary Search
CEOI
2012 - Job Scheduling
Easy
Show TagsBinary Search
CF
Magazine Ad
Easy
Show Tags2P, Binary Search, Greedy
CF
Cutting Out
Easy
Show TagsBinary Search
CF
Graph Composition
Easy
Show TagsConnected Components, DSU
CF
Restore Graph
Easy
Show TagsBFS
CF
Building an Aquarium
Easy
Show TagsBinary Search
CSES
All Manhattan Distances
Easy
Show TagsSorting
CF
Kites
Easy
Show TagsPrefix Sums
IOI
2010 - Traffic
Easy
Show TagsTree
CF
Moamen and k-subarrays
Easy
Show TagsGreedy, Sorting
CSES
Maximum Manhattan Distances
Normal
Show TagsGeometry
CF
Save the Nature
Normal
Show TagsBinary Search, Sorting
AC
Pond
Normal
Show TagsBinary Search, Prefix Sums
CCC
Firehose
Normal
Show TagsBinary Search
Silver
Circular Barn - The Game
Normal
Show TagsGame Theory, NT
Old Gold
Sabotage
Normal
Show TagsBinary Search, Prefix Sums
CF
Firecrackers
Normal
Show TagsBinary Search, Sorting
Silver
Just Green Enough
Normal
Show TagsPrefix Sums
CF
Min Max Sort
Normal
Show TagsBinary Search, Two Pointers
CF
Three Base Stations
Normal
Show TagsBinary Search, 2P
CF
To Become Max
Normal
Show TagsBinary Search
CF
Big Brush
Normal
Show TagsAd Hoc, DFS, Greedy
CF
Replace the Numbers
Normal
Show TagsSorting
CF
Friendly Spiders
Normal
Show TagsBFS, Bipartite, Graphs, Number Theory, Shortest Path
CF
Counting Rectangles
Normal
Show TagsPrefix Sums
CF
Count the Trains
Normal
Show TagsSorted Set
CF
Array and Segments
Normal
Show TagsSorted Set
CF
Set Or Decrease
Normal
Show TagsBinary Search, Prefix Sums
CF
Adjust The Presentation
Normal
Show TagsGreedy
CF
Medium Demon Problem (easy version)
Normal
Show TagsFunctional Graphs
CF
Medium Demon Problem (hard version)
Normal
Show TagsFunctional Graphs
CF
Medical Parity
Normal
Show TagsBitwise, Greedy, Prefix
CF
Salary Changing
Normal
Show TagsBinary Search
CCC
Escape Room
Normal
Show TagsFlood Fill
CCC
Phenomenal Reviews
Normal
Show TagsTree
POI
2017 - Sabotage
Normal
Show TagsTree
CF
Split Into Two Sets
Normal
Show TagsBipartite, DFS
CF
Giving Awards
Normal
Show TagsDFS, TopoSort
CF
Trapmigiano Reggiano
Normal
Show TagsGreedy, Trees
CF
Robot Queries
Normal
Show TagsBinary Search, Prefix Sums
CF
Hypercarp and Interdimensional Jumps
Normal
CF
Round Dance
Normal
Show TagsConnected Components, DFS
CF
Mahmoud & Ehab & Function
Normal
Show TagsBinary Search
CF
Ammar-utiful Array
Normal
Show TagsBinary Search, Prefix Sums
CF
Preparing for Merge Sort
Normal
Show TagsBinary Search
CF
Minimizing Difference
Normal
Show TagsBinary Search, Greedy, Prefix Sums
CF
Connecting Universities
Hard
Show TagsDFS
CF
Minimax Problem
Hard
Show TagsBinary Search, Bitmasks
AC
Fennec VS. Snuke
Hard
Show TagsGame Theory, Trees
CF
Eating
Hard
Show Tags2D Prefix Sums, Bitmasks, DP
IOI
2013 - Dreaming
Hard
Show TagsTree
Gold
OohMoo Milk
Hard
Show TagsBinary Search, Sorting
CF
Red Light, Green Light (Hard Version)
Hard
Show TagsBinary Search, Functional Graph, Math
CF
Tree Compass
Very Hard
Show TagsTree
CF
Carrots for rabbits
Very Hard
Show TagsMath, Priority Queue
Kattis
Lane Switching
Very Hard
Show TagsBinary Search, Connected Components
APIO
2011 - Table Coloring
Very Hard
Show TagsBipartite
Gold
Cowdependence
Very Hard
Show TagsBinary Search, Prefix Sums, Sqrt, Two Pointers
Platinum
Load Balancing
Insane
Show TagsBinary Search, Sorting

Final Thoughts

Refer to our FAQ to find more problems to practice. You may also find the How to Practice module worth reading. Best of luck on future contests!

Module Progress:

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