ID NAME QUALITY USERS ACC % DIFFICULTY C I
9493 Advanced Fruits   77 1798
19
16
19301 Operators (new ver)   1 29
42
17
28587 A problem of Backtracking   4 319
1
8
27182 Easy modified sudoku   4 200
17
12
35337 Faketorial Hashing   1 0
34
34
17406 Cheating a Boolean Tree   5 88
23
15
31894 House Buying Optimizations   4
1538 Making Jumps   10 1196
16
13
15609 Spiky Mazes   18 428
15
12
34973 Yet Another Subset Sum Problem   1 2
17
34
4525 Digger Octaves   5 261
17
21
224 Vonny and her dominos   4 563
9
9

#backtracking

Backtracking is a general algorithm for finding all (or some) solutions to a computational problem that incrementally builds candidates to the solutions, and abandons (backtracks) each partial candidate as soon as it is able to determine that it cannot be completed to a valid solution

https://en.wikipedia.org/wiki/Backtracking http://web.cse.ohio-state.edu/~gurari/course/cis680/cis680Ch19.html - backtracking algorithms http://www.geeksforgeeks.org/tag/backtracking/