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Browse Problems
Title Total Submissions / Solving % Total Users / Solving %
FILE 100 - The 3n + 1 problem 933659
26.64%
143925
73.85%
FILE 101 - The Blocks Problem 124869
25.81%
25149
70.25%
FILE 102 - Ecological Bin Packing 110899
39.40%
32365
87.25%
FILE 103 - Stacking Boxes 46103
26.69%
12340
61.24%
FILE 104 - Arbitrage 33704
25.22%
7160
67.99%
FILE 105 - The Skyline Problem 65232
26.05%
15673
69.21%
FILE 106 - Fermat vs. Pythagoras 29955
34.26%
7090
67.32%
FILE 107 - The Cat in the Hat 53220
21.71%
9214
68.27%
FILE 108 - Maximum Sum 74483
44.58%
23993
83.58%
FILE 109 - SCUD Busters 14186
32.34%
3769
68.32%
FILE 110 - Meta-Loopless Sorts 13180
32.22%
3636
66.17%
FILE 111 - History Grading 35992
45.59%
13631
77.88%
FILE 112 - Tree Summing 39570
28.30%
8162
78.17%
FILE 113 - Power of Cryptography 78608
40.98%
24971
89.12%
FILE 114 - Simulation Wizardry 8985
32.61%
2615
75.33%
FILE 115 - Climbing Trees 7706
35.22%
2317
81.40%
FILE 116 - Unidirectional TSP 70584
25.40%
12753
72.70%
FILE 117 - The Postal Worker Rings Once 10123
49.69%
3993
89.36%
FILE 118 - Mutant Flatworld Explorers 28975
41.88%
10185
86.84%
FILE 119 - Greedy Gift Givers 45196
28.94%
13229
74.84%
FILE 120 - Stacks of Flapjacks 47584
41.22%
12910
87.27%
FILE 121 - Pipe Fitters 8449
43.16%
3434
87.30%
FILE 122 - Trees on the level 42475
29.54%
7597
74.61%
FILE 123 - Searching Quickly 14766
35.66%
4963
75.50%
FILE 124 - Following Orders 15200
39.11%
5132
78.84%
FILE 125 - Numbering Paths 11280
29.77%
3239
74.81%
FILE 126 - The Errant Physicist 4536
31.75%
1620
75.86%
FILE 127 - "Accordian" Patience 19324
40.15%
4866
81.63%
FILE 128 - Software CRC 20161
42.89%
4509
88.00%
FILE 129 - Krypton Factor 16110
39.80%
3173
84.31%
FILE 130 - Roman Roulette 9820
42.23%
4000
81.47%
FILE 131 - The Psychic Poker Player 4352
50.00%
1879
88.45%
FILE 132 - Bumpy Objects 4442
42.17%
1242
82.21%
FILE 133 - The Dole Queue 28883
49.53%
8116
88.96%
FILE 134 - Loglan-A Logical Language 3761
29.57%
1125
80.27%
FILE 135 - No Rectangles 3367
27.92%
1264
53.24%
FILE 136 - Ugly Numbers 126041
32.89%
30671
79.49%
FILE 137 - Polygons 4939
21.60%
1136
62.15%
FILE 138 - Street Numbers 22007
45.56%
8965
84.76%
FILE 139 - Telephone Tangles 10337
16.16%
1731
48.99%
FILE 140 - Bandwidth 16892
43.06%
3820
87.72%
FILE 141 - The Spot Game 8904
44.62%
2717
89.92%
FILE 142 - Mouse Clicks 7021
22.28%
2445
46.01%
FILE 143 - Orchard Trees 20688
12.59%
2672
44.76%
FILE 144 - Student Grants 7741
46.60%
3142
85.39%
FILE 145 - Gondwanaland Telecom 10656
25.62%
2901
74.80%
FILE 146 - ID Codes 35860
57.69%
16388
93.55%
FILE 147 - Dollars 65519
28.81%
12984
75.28%
FILE 148 - Anagram checker 5558
35.48%
1600
76.38%
FILE 149 - Forests 1318
45.90%
462
75.97%
FILE 150 - Double Time 2693
32.68%
872
66.51%
FILE 151 - Power Crisis 27548
60.61%
12158
93.19%
FILE 152 - Tree's a Crowd 12636
39.10%
3654
87.14%
FILE 153 - Permalex 7985
29.52%
2650
70.75%
FILE 154 - Recycling 7357
53.19%
3686
89.26%
FILE 155 - All Squares 7498
50.41%
3418
86.22%
FILE 156 - Ananagrams 35752
66.13%
11913
94.54%
FILE 157 - Route Finding 2148
32.77%
713
80.22%
FILE 158 - Calendar 3429
16.13%
784
57.27%
FILE 159 - Word Crosses 5647
24.47%
1824
60.80%
FILE 160 - Factors and Factorials 46742
31.80%
12944
83.04%
FILE 161 - Traffic Lights 10690
38.71%
3587
89.10%
FILE 162 - Beggar My Neighbour 6438
33.55%
1927
81.21%
FILE 163 - City Directions 1874
14.73%
356
57.87%
FILE 164 - String Computer 14022
31.47%
3076
75.39%
FILE 165 - Stamps 4493
41.18%
1506
80.74%
FILE 166 - Making Change 12036
39.21%
3219
86.08%
FILE 167 - The Sultan's Successors 29230
46.74%
8766
90.50%
FILE 168 - Theseus and the Minotaur 9632
33.78%
2100
73.67%
FILE 169 - Xenosemantics 2120
19.95%
334
64.37%
FILE 170 - Clock Patience 7354
45.47%
2748
90.25%
FILE 171 - Car Trialling 3483
14.21%
570
70.00%
FILE 172 - Calculator Language 2701
25.81%
781
69.65%
FILE 173 - Network Wars 3091
16.98%
646
45.05%
FILE 174 - Strategy 1317
39.26%
552
79.71%
FILE 175 - Keywords 2362
17.57%
574
47.56%
FILE 176 - City Navigation 979
31.97%
307
80.78%
FILE 177 - Paper Folding 3970
40.20%
1217
72.64%
FILE 178 - Shuffling Patience 1193
38.89%
444
77.48%
FILE 179 - Code Breaking 2392
25.29%
642
72.90%
FILE 180 - Eeny Meeny 2667
22.61%
695
43.45%
FILE 181 - Hearts 1257
48.85%
621
83.90%
FILE 182 - Bonus Bonds 913
42.72%
444
79.05%
FILE 183 - Bit Maps 7439
26.71%
1991
76.29%
FILE 184 - Laser Lines 4951
44.42%
1395
85.30%
FILE 185 - Roman Numerals 3163
41.04%
1029
82.80%
FILE 186 - Trip Routing 4794
31.48%
1584
70.33%
FILE 187 - Transaction Processing 3808
37.61%
1407
79.39%
FILE 188 - Perfect Hash 5435
48.89%
1861
88.39%
FILE 189 - Pascal Program Lengths 1118
22.81%
321
62.31%
FILE 190 - Circle Through Three Points 18709
35.31%
5752
78.51%
FILE 191 - Intersection 30778
22.94%
6183
69.38%
FILE 192 - Synchronous Design 1194
30.15%
430
69.30%
FILE 193 - Graph Coloring 24240
28.45%
5820
70.82%
FILE 194 - Triangle 2764
17.11%
559
48.48%
FILE 195 - Anagram 45501
25.96%
10809
69.65%
FILE 196 - Spreadsheet 13433
25.58%
2304
76.09%
FILE 197 - Cube 1571
19.80%
384
46.09%
FILE 198 - Peter's Calculator 2987
19.69%
647
63.83%
FILE 199 - Partial differential equations 1033
22.27%
402
44.78%
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