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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
43 Copying Books   45 2849 25.81
19
19
110 Fill the Cisterns   29 1425 31.42
21
20
130 Rent your airplane and make money   88 3387 28.64
18
17
148 Land for Motorways   3 215 41.02
17
21
297 Aggressive cows   1075 47474 35.99
16
23
665 String it out   22 1221 38.85
12
15
1296 4 values whose sum is 0   64 5120 24.92
18
14
1431 Projections Of A Polygon   2 122 10.39
12
6
1713 Funny scales   12 563 30.57
17
16
1837 Pie   60 4128 30.44
18
15
2738 Number Guessing Game   42 4631 62.51
8
13
2905 Not a Triangle   93 5052 38.67
11
11
3273 Order statistic set   160 3443 26.89
22
20
3363 Svada   10 496 28.88
9
15
3749 Subset Sums   74 4224 26.66
17
20
3975 Most Servings Meal   8 354 26.37
28
28
3983 Right Triangle Counting   3 190 17.72
30
21
4061 Polygon   4 215 31.41
21
17
4200 Hamster flight   13 1160 45.54
5
13
4415 Power of Integer   1 277 22.01
17
26
4483 Roads Repair   7 182 32.65
20
23
4560 The Double HeLiX   147 8979 37.55
11
10
4580 ABCDEF   218 7920 29.35
14
16
5161 Factorial vs Power   14 1139 25.96
13
15
5296 Air Combat   -1 71 15.71
34
5652 Snow White and the N dwarfs   32 1029 18.08
21
31
5970 Finding Primes   22 1345 27.95
16
15
5978 Frequent Prime Ranges   10 717 28.80
14
14
6168 Building Bridges   27 1665 25.98
11
17
6169 Standing Sequence   2 122 28.60
34
39
6956 IOI2009 Mecho   3 167 18.36
28
23
7386 Activities   62 1446 25.56
16
19
8002 Horrible Queries   399 11157 29.80
19
18
8129 Sky Lift   2 142 25.60
24
19
8406 Temple Queues   14 296 19.34
32
33
8952 Catapult that ball   34 3205 26.33
12
12
8985 Line up   19 416 51.74
16
17
9734 Hacking the random number generator   62 5882 39.02
8
6
10712 Easy Calculation   16 1377 35.93
10
14
10810 Its a Murder!   56 2403 22.15
16
16
11814 Eko   172 16725 26.94
14
14
12151 Pizzamania   28 2184 28.64
5
4
13780 Audition   18 656 24.08
17
17
14543 Range Sum   26 1014 38.05
11
12
14742 Building Bridges(HARD)   10 454 24.08
14
17
14929 Subsequence   2 178 12.79
10
15
15376 Running Median   15 1181 26.18
11
9
15454 How to Handle the Fans   39 1530 50.54
12
11
16179 Platinum Relic!   1 68 22.62
6
6
16254 Running Median Again   41 1810 22.59
20
16

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