1. Republic of Korea 1951.36
2. China 1917.43
3. Russia 1900.71
4. United States of America 1870.01
5. Japan 1730.84
6. Iran 1693.59
7. Poland 1592.33
8. Kazakhstan 1556.55
9. Vietnam 1553.34
10. Australia 1547.95
11. Taiwan 1491.94
12. Thailand 1467
13. Romania 1457.23
14. Bulgaria 1439.36
15. Serbia 1409.59
16. Croatia 1395.37
17. Turkey 1390.71
18. Singapore 1365.59
19. Canada 1347
20. Hong Kong 1335.81
21. Belarus 1298.67
22. Ukraine 1273.93
23. Finland 1231.02
24. Slovakia 1170.02
25. India 1137.07
26. Latvia 1088
27. Indonesia 1063.77
28. Italy 1018.32
29. Germany 1010.62
30. Georgia 1005.37
31. Hungary 990.83
32. South Africa 909.97
33. Sweden 893.33
34. Israel 884.23
35. Brazil 839.24
36. Lithuania 833.07
37. Armenia 832.6
38. Norway 798.9
39. United Kingdom 797.62
40. Czech Republic 766.45
41. Austria 765.73
42. New Zealand 758.3
43. Greece 720.46
44. Switzerland 714.09
45. Estonia 690.19
46. France 688.77
47. Moldova 658.45
48. Tajikistan 642.68
49. Belgium 639.67
50. Turkmenistan 634
51. Spain 596.88
52. Mexico 570.48
53. Syria 570.35
54. Malaysia 535.36
55. Bangladesh 528.25
56. Luxembourg 512.85
57. Macedonia 505.02
58. Netherlands 476.28
59. Egypt 470
60. Philippines 430.92
61. Kyrgyzstan 428.34
62. Denmark 393.61
63. Tunisia 388.9
64. Macau 377.88
65. Portugal 365.45
66. Mongolia 345.9
67. Chile 342.99
68. Argentina 321.76
69. Cyprus 317.45
70. Bosnia and Herzegovina 300.87
71. Colombia 299.23
72. Montenegro 298.58
73. Sri Lanka 281.51
74. Slovenia 224.46
75. Ireland 207.45
76. Bolivia 204.4
77. Jordan 203
78. Azerbaijan 184.27
79. Dominican Republic 158.45
80. Cuba 156.45
81. Uzbekistan 138.45
82. Venezuela 89.63
83. Nigeria 0

I saw this in TopCoder. But I can't understand what the f array show.

f[1][1] = 1;
for( i,2,n )
    for( j,1,i )
        f[i][j] = f[i-1][j-1] + j*f[i-1][j];

Is it Mathematical function? Can someone help?

How can I find least one bit in bitset? I can't use A&-A where A is bitset.

Next contest is two weeks later. We are patient. Let's make it one year!