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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
1961 Roman Roads   1 103 31.59
9
17
3305 Roman Patrollers   53 59.35
11986 ROMAN NUMERALS   1 145 33.76
9
9
398 Roll Playing Games   121 14.67
34
17
22561 Roger and tree III   6 32 14.45
26
26
20775 Roger and tree   22 343 27.78
17
22
202 Rockets   -1 60 12.32
34
34
6356 Rock-Paper-Scissors-Lizard-Spock   2 178 42.29
12
23
9652 Robots on a grid   21 865 19.47
17
13
2059 Robotic Sort   5 740 33.19
28
26
40016 Robot World   2 72 11.84
34
34
1463 Robot Number M   80 46.91
1
17
25048 Robot   5 82 25.91
23
28
3463 Robintron   8 22.06
42529 Robert Plays The Viola   3 39 45.54
4
8
18153 Robert Langdon & The Rule of Three   3 41 36.36
23
34
18094 Robert Langdon & Florence   1 181 64.31
28
23
18050 Robert Langdon & Class Attendance   1 40 25.51
17
17
18056 Robert Langdon & Cipher   2 567 50.57
1
13
10230 Robbing Gringotts   56 11.07
6290 Robbery 2   7 807 32.90
17
13
4062 Rob Mini-Safe   114 39.46
4483 Roads Repair   7 182 32.65
20
23
13868 Roads of NITT   43 625 29.39
24
24
7025 Roads in Berland   1 135 33.29
17
34
338 Roads   37 1398 23.96
17
22
8329 Road trip   1 82 39.22
26
26
27099 Road Times   1 7 32.50
9969 Road Network   1 308 22.00
17
9
178 Road net   12 2394 49.63
9
8
7637 Road Map   3 79 54.90
20
20
18201 RK Sorting   20 1382 38.78
21
12
21853 Rivals   23 511 33.85
17
24
36132 Rightful Distribution   10 157 40.91
8
8
3983 Right Triangle Counting   3 190 17.72
30
21
32201 Right Shift   -1 221 11.26
17
8
4574 Riding in cycles   44 23.96
21966 Ricochet Robots   3 26 50.00
23
12
34636 Richie Rich and Keen Bean   51 45.24
17
23
36324 Richest_Beggar   7 183 35.41
4
9
118 Rhombs   113 42.32
1
34
8578 Reverse the Sequence   1 89 38.72
34
50
14973 Reverse Fox Hunt   2 81 46.30
17
9
10464 Reverse Engineering   4 142 48.24
17
28
3009 Revenge of Voronoi   14 30.26
8433 Revenge of the squares (variation)   1 490 49.27
17
17
8418 Revenge of the squares   1 89 36.83
17
17
9693 Revenge of Fibonacci   2 97 31.16
34
34
26119 Revenge of Arjuna   2 37 36.96
17
17
14820 Return of the Digger   2 13 17.59
17
17

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