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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
4031 Mass of Molecule   29 2565 48.15
12
9
4021 Bipalindrome   182 30.80
4010 Chặt cây   7 40.00
4008 Con Voi   7 62.50
4004 Exploding CPU   141 46.17
4003 Subway planning   40 18.08
4000 GALLUP   1 64 44.44
17
34
3999 FROGGER   3 97 27.01
28
23
3983 Right Triangle Counting   3 188 18.00
30
21
3982 String problem   7 604 48.95
9
23
3981 Shortest Regular Bracket   80 35.85
3980 Point Visible   1 49 32.22
34
50
3979 Whirligig number   7 1019 37.93
10
15
3978 Distance Query   68 1681 32.18
24
21
3977 Police Query   8 291 17.08
27
30
3975 Most Servings Meal   8 349 26.33
28
28
3974 Another Tree Problem   7 643 32.56
17
23
3973 0 0 Pairs   4 800 27.29
15
15
3972 Stargates   45 13.29
3970 Convert to Decimal Base System   53 40.29
17
17
3969 M&M Game   12 1288 42.10
4
17
3965 Minimax Triangulation   58 34.60
3964 Investment Money   15 617 25.57
16
17
3962 ELEVATOR II   2 99 42.96
9
26
3961 Journey with Pigs   129 42.90
3953 Paid Roads   8 249 26.75
19
26
3948 Polynomial Evaluation - Angry Teacher   -1 30 15.28
50
50
3946 K-th Number   238 5129 34.45
25
27
3944 Bee Walk   18 1423 56.23
11
15
3943 Nested Dolls   29 1219 23.64
19
26
3942 Cleaning Robot   30 66.15
3941 Kth Shortest Path   26 29.38
3940 Sum of Primes   3 223 62.58
9
9
3939 Search of Concatenated Strings   27 26.32
3937 Wooden Sticks   8 674 36.88
21
26
3936 Repair City Hall   4 241 50.00
5
1
3935 SHIFT Operator on Matrix   187 42.04
3934 Recaman’s Sequence   25 3527 53.90
9
6
3933 Minimum Permutation   6 182 38.17
12
17
3932 Point Connection Game in a Circle   3 746 35.40
13
21
3931 Maximum Triangle Area   2 280 29.19
5
28
3930 Group Partition   67 29.94
3929 Different Digits   71 22.60
3928 Counting Digits   7 1095 44.23
22
26
3927 Polygon on the Grid   22 36.62
3926 Manhattan Wire   81 14.32
3924 Filchs Dilemna   7 520 65.27
9
17
3923 Philosophers Stone   308 12626 43.45
10
11
3922 Mystical River   127 25.47
3921 The Great Ball   60 3925 39.09
7
11

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