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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
43 Copying Books   45 2816 25.68
19
19
110 Fill the Cisterns   29 1415 31.41
21
20
130 Rent your airplane and make money   88 3376 28.65
18
17
148 Land for Motorways   3 215 42.44
17
21
297 Aggressive cows   1074 46495 35.93
16
23
665 String it out   22 1218 38.76
12
15
1296 4 values whose sum is 0   64 5108 24.90
18
14
1431 Projections Of A Polygon   2 121 10.38
12
6
1713 Funny scales   12 562 30.54
17
16
1837 Pie   60 4042 30.31
18
15
2738 Number Guessing Game   42 4630 62.52
8
13
2905 Not a Triangle   93 5037 38.70
11
11
3273 Order statistic set   160 3329 26.44
22
20
3363 Svada   10 494 28.79
9
15
3749 Subset Sums   74 4161 26.54
17
20
3975 Most Servings Meal   8 353 26.30
28
28
3983 Right Triangle Counting   3 189 17.79
30
21
4061 Polygon   4 214 31.29
21
17
4200 Hamster flight   13 1153 45.40
5
13
4415 Power of Integer   1 275 22.05
17
26
4483 Roads Repair   7 180 32.64
20
23
4560 The Double HeLiX   147 8920 37.57
11
10
4580 ABCDEF   218 7881 29.29
14
16
5161 Factorial vs Power   14 1132 26.06
13
15
5296 Air Combat   -1 66 14.87
34
5652 Snow White and the N dwarfs   32 992 17.71
21
31
5970 Finding Primes   22 1341 27.91
16
15
5978 Frequent Prime Ranges   10 710 28.93
14
14
6168 Building Bridges   27 1654 26.06
11
17
6169 Standing Sequence   2 120 28.60
34
39
6956 IOI2009 Mecho   3 166 18.33
28
23
7386 Activities   62 1437 25.53
16
19
8002 Horrible Queries   398 11054 29.77
19
18
8129 Sky Lift   2 141 25.58
24
19
8406 Temple Queues   14 294 19.27
32
33
8952 Catapult that ball   33 3092 26.22
12
12
8985 Line up   19 407 51.26
16
17
9734 Hacking the random number generator   62 5859 39.00
8
6
10712 Easy Calculation   16 1375 35.90
10
14
10810 Its a Murder!   55 2393 22.09
16
17
11814 Eko   172 16256 26.82
14
14
12151 Pizzamania   28 2166 28.45
5
4
13780 Audition   18 650 24.01
17
17
14543 Range Sum   26 1000 37.97
11
12
14742 Building Bridges(HARD)   10 451 24.06
14
17
14929 Subsequence   2 177 12.73
10
15
15376 Running Median   15 1167 26.17
11
9
15454 How to Handle the Fans   39 1523 50.43
12
11
16179 Platinum Relic!   1 68 22.62
6
6
16254 Running Median Again   41 1778 22.44
20
16

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