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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
4259 Pilots   34 1755 31.69
17
20
6949 PIN   145 28.30
17
34
26214 Pisano Factors   3 27 30.06
26
26
2161 Pixel Shuffle   34 21.03
50
17
7169 Pizza   45 6438 29.98
10
8
36674 PIZZA   4 495 18.13
1
13
4034 Pizza Delivery   53 16.51
4180 Pizza Location   2 577 18.60
31
17
34619 Pizza Prize   7 131 46.88
14
12
28742 Pizza Store and Gasoline   4 69 44.49
26
23
12151 Pizzamania   28 2187 28.66
5
4
8333 Place-name game   75 36.34
7297 Placing Coins on a Grid   2 61 32.53
17
17
4156 PLAHTE   69 35.77
698 Plane Hopping   1 289 25.31
17
11460 Planning Poker   258 41.88
36123 Plant the potatoes   2 18 15.15
17
26
16179 Platinum Relic!   1 68 22.62
6
6
327 Platon and Socrates   51 12.63
9
34
41 Play on Words   43 3314 19.59
21
24
1477 Play with a Tree   95 15.49
17
50
14629 Play with Binary Numbers   4 509 39.37
8
9
10366 Play with Dates   9 1434 38.73
16
6
1475 Play with Digit Seven   3 136 38.22
28
12
15965 PLAY WITH MATH   60 6904 46.49
4
5
15143 play with prime numbers (I)   5 35 17.68
23
23
15148 play with prime numbers (II)   5 35 20.83
28
23
15149 play with prime numbers (III)(hard )   6 29 42.60
34
28
16389 Play with Strings   1 46 23.20
17
34
31052 PLAYGAME   6 717 42.82
3
4
7240 Playground   2 208 41.97
1
6
8055 Playground   280 25.94
31231 Playing Darts   34 29.50
17
1
15567 Playing With Balls   23 1777 65.36
2
11
24998 PLAYING WITH BITS   34 796 22.00
13
13
21615 Playing with GCD   21 1035 34.61
12
14
21968 Playing with Geometry   18 61.29
17
1
16300 Playing with isosceles triangle   5 322 27.32
13
21
5107 Playing with Marbles   7 796 23.69
12
8
34685 Playing With Subarray   13 124 37.53
21
17
9967 Playing with Words   2 36 31.95
34
26
2031 Please help You-Know-Who   39 28.65
9891 Please, go first   221 54.66
26
17
8449 Plotting functions (variation)   1 24 22.14
17
17
364 Pocket Money   53 2248 38.59
15
18
3932 Point Connection Game in a Circle   3 768 35.47
13
21
9334 Point in tetrahedron   2 141 57.59
9
17
6681 Point on the side of the rectangle   1 138 44.69
17
17
3980 Point Visible   1 48 27.40
34
50
26306 Pointers   26 33.33

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