Standard input is empty

 f(0) = 1 
 f(1) = 1 
 f(2) = 2 
 f(3) = 3 
 f(4) = 4 
 f(5) = 5 
 f(6) = 6 
 f(7) = 7 
 f(8) = 8 
 f(9) = 9 
 f(10) = 10 
 f(11) = 11 
 f(12) = 12 
 f(13) = 13 
 f(14) = 14 
 f(15) = 15 
 f(16) = 16 
 f(17) = 17 
 f(18) = 18 
 f(19) = 19 
 f(20) = 20 
 f(21) = 21 
 f(22) = 22 
 f(23) = 23 
 f(24) = 24 
 f(25) = 25 
 f(26) = 26 
 f(27) = 27 
 f(28) = 28 
 f(29) = 29 
 f(30) = 30 
 f(31) = 31 
 f(32) = 32 
 f(33) = 33 
 f(34) = 34 
 f(35) = 35 
 f(36) = 36 
 f(37) = 37 
 f(38) = 38 
 f(39) = 39 
 f(40) = 40 
 f(41) = 41 
 f(42) = 42 
 f(43) = 43 
 f(44) = 44 
 f(45) = 45 
 f(46) = 46 
 f(47) = 47 
 f(48) = 48 
 f(49) = 49 
 f(50) = 50 
 f(51) = 51 
 f(52) = 52 
 f(53) = 53 
 f(54) = 54 
 f(55) = 55 
 f(56) = 56 
 f(57) = 57 
 f(58) = 58 
 f(59) = 59 
 f(60) = 60 
 f(61) = 61 
 f(62) = 62 
 f(63) = 63 
 f(64) = 64 
 f(65) = 65 
 f(66) = 66 
 f(67) = 67 
 f(68) = 68 
 f(69) = 69 
 f(70) = 70 
 f(71) = 71 
 f(72) = 72 
 f(73) = 73 
 f(74) = 74 
 f(75) = 75 
 f(76) = 76 
 f(77) = 77 
 f(78) = 78 
 f(79) = 79 
 f(80) = 80 
 f(81) = 81 
 f(82) = 82 
 f(83) = 83 
 f(84) = 84 
 f(85) = 85 
 f(86) = 86 
 f(87) = 87 
 f(88) = 88 
 f(89) = 89 
 f(90) = 90 
 f(91) = 91 
 f(92) = 92 
 f(93) = 93 
 f(94) = 94 
 f(95) = 95 
 f(96) = 96 
 f(97) = 97 
 f(98) = 98 
 f(99) = 99