Problems
Stepan's Alarm Clocks#7294
Very easy · Number theory · Math
Rectangle and Paths#7295
Medium · Graphs · Sorting
Stepan and Matches#7296
Very easy · Implementation
Marisia and Stepan#7297
Very hard · Brute force
Number#7298
Easy · Sorting
Ties#7299
Very easy · Greedy algorithms
Code Lock#7300
Hard · Brute force
Stations#7301
Easy · Greedy algorithms · Prefix Sums
The Journey of King Shahzeman#7302
Very easy · Math
Baghdad Registration#7303
Very easy · Math
Code lock#7304
Easy · Brute force
Golden Brick#7305
Easy · Combinatorics · Dynamic programming
Chess Masters#7306
Easy · Brute force · Implementation · String suffix structures
Deal!#7309
Easy · Brute force
Jump#7310
Medium · Math · Dynamic programming
Insert Parentheses#7311
Very easy · Implementation
Homer Simpson's barrels#7312
Medium · Data Structures · Implementation · Binary Search
k-Tree#7313
Easy · Dynamic programming · Math
Longest Valid Parentheses#7314
Easy · Stacks
Additive Class#7315
Very hard · Math · Number theory
Board Blitz#7316
Hard · Bitwise Operations · Bitsets
Divisor Count#7317
Hard · Math · Number theory
Domino Tiling#7318
Easy · Graphs
Hourglass#7319
Easy · Graphs · Implementation
k-th Meander#7320
Medium · Combinatorics · Sorting