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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
15436 Slick   52 2025 33.20
9
9
9126 Time to live   48 2021 37.76
12
15
11840 Sum of Squares with Segment Tree   53 2008 50.95
23
18
4164 A conjecture of Paul ErdÅ‘s   23 2004 45.09
16
14
7668 Pebble Solver   15 1995 50.40
8
11
10639 The Blind Passenger   9 1989 44.73
4
5
3408 DNA Sequences   46 1975 26.29
16
20
14441 Three Circle Problem (EASY)   12 1961 55.34
6
13
9820 Through the troops   29 1950 44.91
12
11
4206 Fast Maximum Matching   29 1948 29.19
22
19
33 Trip   18 1932 25.92
25
16
13913 Real Mangoes for Ranjith   7 1929 41.96
3
8
8545 Subset sum   45 1923 39.94
12
16
4549 Adding Sevens   19 1921 33.11
17
6
22403 Divisors of factorial   70 1906 29.89
14
14
15429 Counting Ids   15 1896 50.04
5
5
16139 Naya Shatranj (New Chess)   10 1886 68.97
4
17
2006 Load Balancing   19 1885 47.42
11
19
10514 K12 - Building Construction   57 1878 25.59
12
17
11374 Database   11 1874 34.65
6
6
23776 K-Query Online   82 1864 40.61
20
24
16211 Boring Factorials   34 1861 34.67
12
17
8725 Closest Point Pair   31 1837 20.17
19
21
8374 PARKET   4 1836 56.12
3
4
9805 Be Awesome As Barney Stinson   43 1806 68.21
12
13
1812 Longest Common Substring II   14 1798 17.65
29
29
51 Fake tournament   42 1786 27.35
18
19
2901 One Geometry Problem   9 1785 36.01
4
13
10228 Magic Grid   44 1781 26.31
14
19
25942 Ball sum   42 1770 35.64
11
11
9340 Arbitrage   35 1766 39.06
11
17
16033 Tip Top Game   17 1758 27.06
2
7
23976 Mohib and series   40 1758 47.07
4
7
15567 Playing With Balls   23 1757 65.44
2
11
12880 Sheep   38 1752 44.42
10
10
9952 111…1 Squared   8 1749 46.59
5
10
21332 Pigeonhole Tower   7 1748 35.69
4
6
11932 Amz Rock   12 1746 62.10
4
7
22393 KATHTHI   56 1745 32.20
16
17
4082 BLAST   30 1742 51.60
8
16
10676 0110SS   25 1742 41.14
13
9
13384 Nice Binary Trees   26 1741 39.09
9
13
4226 Japan   30 1740 23.27
16
19
3920 Lucius Dungeon   17 1737 38.66
17
12
12914 Totient Extreme   42 1732 39.97
8
11
503 Prime Intervals   65 1725 15.77
21
19
359 Alpha Centauri Tennis   2 1721 50.53
3
8
28305 Ada and Indexing   56 1721 40.82
15
15
2939 Query on a tree V   75 1714 27.89
29
30
10293 FANCY NUMBERS   18 1714 50.28
7
9

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