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Problems

Average
All Problems Very simple Simple Average Difficult Very difficult
Classification
All Problems ---topological-sort- ---traveling-salesman-problem- -three- 2-sat algorithms-on-strings articulation-point backtracking beginners bellman-ford-algorithm binary-search bitwise-operators breadth-first-search bridges calculation-system catalan-numbers clique combinatorics connected-components depth-first-search dijkstra-algorithm Others...
4
Two circles
8774 / 14203
6
The vouchers
1404 / 2219
8
Matches
4616 / 6873
9
N-digit numbers
3368 / 5048
11
Big accuracy
3969 / 6550
12
Injured Picture
883 / 1336
13
Spider and Fly
1603 / 2921
16
Dragon
1767 / 2798
20
How many times to repeat?
5507 / 8237
22
"Mirror prime" numbers
2948 / 5170
25
Paint3D
635 / 935
33
The favourite numbers of Santa Claus
1792 / 2733
36
Gorynych the Dragon
1276 / 1836
40
Pipeline (RU)
258 / 462
41
Command of the Mayor
423 / 644
48
The Red and Blue Squares
428 / 629
49
The Smart Cat
760 / 1146
50
The cut number
382 / 557
55
The presents to the 8th of March
713 / 1158
62
The Factorial
2124 / 3976
68
Metro
126 / 181
84
Transfer
46 / 72
88
LeChuck’s Revenge
76 / 118
93
Truck Driving
69 / 112
94
Primes’ Problem
56 / 90