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- Collecting Game1100Codeforcesbinary searchdpgreedysortings
- Collecting Packages1200Codeforcesimplementationsortings
- Collective Mindsets (easy)1100Codeforces
- Collision in Space1586CodeChef
- Colorful Stamp1100Codeforcesimplementation
- Colorful Tree (Easy Version)1568CodeChef
- Coloring a Tree1200Codeforcesdfs and similardsugreedy
- Combination1100Codeforcesgreedysortings
- Combinatorics Homework1100Codeforcescombinatoricsgreedymath
- Common Prefixes1200Codeforcesconstructive algorithmsgreedystrings
- Comparing Strings1100Codeforcesimplementationstrings
- Compilers and Parsers1588CodeChef
- Compress the List1519CodeChef
- Conan and Agasa play a Card Game1200Codeforcesgamesgreedyimplementation
- Concat Palindrome1520CodeChef
- Confusing Concatenations1488CodeChef
- ConneR and the A.R.C. Markland-N1100Codeforcesbinary searchbrute forceimplementation
- Contrast Value1200Codeforcesgreedyimplementation
- Control the Pollution1450CodeChef
- Cool Partition1200Codeforcesdata structuresgreedy
- Coprime1100Codeforcesbrute forcegreedynumber theory
- Copy and Push Back1595CodeChef
- Corner Twist1200Codeforcesconstructive algorithmsgreedyimplementationmath
- Corners1200Codeforcesgreedyimplementation
- Correct Sentence1485CodeChef
- Correct Solution?1100Codeforcesimplementationsortings
- Correctness of Knight Move1482CodeChef
- Corrupted Array1200Codeforcesconstructive algorithmsdata structuresgreedy
- Costly Summit1425CodeChef
- Cottage Village1200Codeforcesimplementationsortings
- Count Good Numbers1100Codeforcesbitmaskscombinatoricsmathnumber theory
- Count Subarrays1510CodeChef
- Counterexample 1100Codeforcesbrute forceimplementationmathnumber theory
- Counting Flags1446CodeChef
- Counting Optimal Arrays1588CodeChef
- Counting Orders1100Codeforcescombinatoricsmathsortingstwo pointers
- Counting Pairs1200Codeforcesbinary searchsortingstwo pointers
- Coupons and Discounts1100Codeforcesconstructive algorithmsgreedy
- Courses in an university1417CodeChef
- Crazy Permutations1408CodeChef
- Creating Keys for StORages Has Become My Main Skill1200Codeforcesbitmasksconstructive algorithmsgreedy
- Creating the Contest1200Codeforcesdpgreedymath
- Creature Hunter1477CodeChef
- Crying Colours1533CodeChef
- Cubical Planet1100Codeforcesmath
- Cutting1200Codeforcesdpgreedysortings
- Cutting Carrot1200Codeforcesgeometrymath
- Cutting Pizza1446CodeChef
- Cycle and Add1597CodeChef
- Cyclic Shift Minimization1571CodeChef
- Cyclists1100Codeforcesbrute forcegamesgreedyimplementation
- DZY Loves Chessboard1200Codeforcesdfs and similarimplementation
- Data Recovery1200Codeforcesimplementation
- Deadline1100Codeforcesbinary searchbrute forcemathternary search
- Decreasing Srrnmieeda1423CodeChef
- Deja Vu1100Codeforcesbrute forcemathsortings
- Delete Two Elements1200Codeforcesdata structuresdpimplementationmath
- Deleting Array Again1444CodeChef
- Depression1200Codeforcesgeometrymath
- Deque Process1100Codeforcesconstructive algorithmsgreedysortingstwo pointers