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Problems

Complexity
All Problems Very simple Simple Average Difficult Very difficult
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All Problems ---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 diophantine-equations Others...
4
Two circles
9956 / 16115
8
Matches
5199 / 7965
76
New case
5767 / 7498
108
Median number
16994 / 19967
126
Number of an apartment
3167 / 4027
138
Cash machine
8114 / 9325
142
Point and piece (RU)
1901 / 2558
143
Point and triangle
3595 / 4478
153
Two rectangulars (RU)
372 / 686
206
Tourist
6284 / 7989
219
Central heating
7712 / 8927
902
The level of educational achievements
21756 / 23405
903
First or last?
20456 / 22566
905
What type of triangle?
18525 / 20461
1312
Wardrobe
7377 / 9461
1623
Even and odd numbers
9751 / 11410
2606
Minimum and maximum
10271 / 10864
3867
Lazy Misha
9003 / 9627
5054
Високосный ли год?
2524 / 2958
6278
City numbers
9755 / 10895
7337
Знижки
5474 / 6625
7365
Milk and a pie
4417 / 5697
7460
Sightseeing trip
7870 / 9074
7784
Bars of Gold
2000 / 2485
7812
Maximum among four numbers
7539 / 8515