1 #include<stdio.h> 2 #include<string.h> 3 #include<math.h> 4 #include<iostream> 5 #include<algorithm> 6 #include<queue> 7 #include<vector> 8 #include<set> 9 #include<stack> 10 #include<string> 11 #include<sstream> 12 #include<map> 13 #include<cctype> 14 #include<limits.h> 15 #include<fstream> 16 #include<stdlib.h> 17 using namespace std; 18 //判断一个数字是否是回文 19 bool IsPalindrome(int iCandidate) 20 { 21 if(iCandidate<0)//负数肯定不是回文 22 return false; 23 else 24 { 25 if(iCandidate<=9)//长度为1的整型数肯定是回文 26 return true; 27 else 28 { 29 //获得逆转值 30 int iSrc=iCandidate; 31 int iDst=0; 32 int iPivot=0; 33 int iPower=0; 34 //获得iCandidate的逆转值 35 while(iSrc!=0) 36 { 37 iDst=iDst*10+iSrc%10; 38 iSrc=iSrc/10; 39 } 40 //比较正序值与逆转值；如果一致，则是回文；否则不是回文 41 if(iDst==iCandidate) 42 return true; 43 else 44 return false; 45 } 46 } 47 } 48 bool isPrime(int num) 49 { 50 if (num == 2 || num == 3) 51 { 52 return true; 53 } 54 if (num % 6 != 1 && num % 6 != 5) 55 { 56 return false; 57 } 58 for (int i = 5; i*i <= num; i += 6) 59 { 60 if (num % i == 0 || num % (i+2) == 0) 61 { 62 return false; 63 } 64 } 65 return true; 66 } 67 int a[800]={5, 7, 11, 101, 131, 151, 181, 191, 313, 353, 68 373, 383, 727, 757, 787, 797, 919, 929, 10301, 10501, 69 10601, 11311, 11411, 12421, 12721, 12821, 13331, 13831, 13931, 14341, 70 14741, 15451, 15551, 16061, 16361, 16561, 16661, 17471, 17971, 18181, 71 18481, 19391, 19891, 19991, 30103, 30203, 30403, 30703, 30803, 31013, 72 31513, 32323, 32423, 33533, 34543, 34843, 35053, 35153, 35353, 35753, 73 36263, 36563, 37273, 37573, 38083, 38183, 38783, 39293, 70207, 70507, 74 70607, 71317, 71917, 72227, 72727, 73037, 73237, 73637, 74047, 74747, 75 75557, 76367, 76667, 77377, 77477, 77977, 78487, 78787, 78887, 79397, 76 79697, 79997, 90709, 91019, 93139, 93239, 93739, 94049, 94349, 94649, 77 94849, 94949, 95959, 96269, 96469, 96769, 97379, 97579, 97879, 98389, 78 98689,1003001,1008001,1022201,1028201,1035301,1043401,1055501,1062601,1065601, 79 1074701,1082801,1085801,1092901,1093901,1114111,1117111,1120211,1123211,1126211, 80 1129211,1134311,1145411,1150511,1153511,1160611,1163611,1175711,1177711,1178711, 81 1180811,1183811,1186811,1190911,1193911,1196911,1201021,1208021,1212121,1215121, 82 1218121,1221221,1235321,1242421,1243421,1245421,1250521,1253521,1257521,1262621, 83 1268621,1273721,1276721,1278721,1280821,1281821,1286821,1287821,1300031,1303031, 84 1311131,1317131,1327231,1328231,1333331,1335331,1338331,1343431,1360631,1362631, 85 1363631,1371731,1374731,1390931,1407041,1409041,1411141,1412141,1422241,1437341, 86 1444441,1447441,1452541,1456541,1461641,1463641,1464641,1469641,1486841,1489841, 87 1490941,1496941,1508051,1513151,1520251,1532351,1535351,1542451,1548451,1550551, 88 1551551,1556551,1557551,1565651,1572751,1579751,1580851,1583851,1589851,1594951, 89 1597951,1598951,1600061,1609061,1611161,1616161,1628261,1630361,1633361,1640461, 90 1643461,1646461,1654561,1657561,1658561,1660661,1670761,1684861,1685861,1688861, 91 1695961,1703071,1707071,1712171,1714171,1730371,1734371,1737371,1748471,1755571, 92 1761671,1764671,1777771,1793971,1802081,1805081,1820281,1823281,1824281,1826281, 93 1829281,1831381,1832381,1842481,1851581,1853581,1856581,1865681,1876781,1878781, 94 1879781,1880881,1881881,1883881,1884881,1895981,1903091,1908091,1909091,1917191, 95 1924291,1930391,1936391,1941491,1951591,1952591,1957591,1958591,1963691,1968691, 96 1969691,1970791,1976791,1981891,1982891,1984891,1987891,1988891,1993991,1995991, 97 1998991,3001003,3002003,3007003,3016103,3026203,3064603,3065603,3072703,3073703, 98 3075703,3083803,3089803,3091903,3095903,3103013,3106013,3127213,3135313,3140413, 99 3155513,3158513,3160613,3166613,3181813,3187813,3193913,3196913,3198913,3211123, 100 3212123,3218123,3222223,3223223,3228223,3233323,3236323,3241423,3245423,3252523, 101 3256523,3258523,3260623,3267623,3272723,3283823,3285823,3286823,3288823,3291923, 102 3293923,3304033,3305033,3307033,3310133,3315133,3319133,3321233,3329233,3331333, 103 3337333,3343433,3353533,3362633,3364633,3365633,3368633,3380833,3391933,3392933, 104 3400043,3411143,3417143,3424243,3425243,3427243,3439343,3441443,3443443,3444443, 105 3447443,3449443,3452543,3460643,3466643,3470743,3479743,3485843,3487843,3503053, 106 3515153,3517153,3528253,3541453,3553553,3558553,3563653,3569653,3586853,3589853, 107 3590953,3591953,3594953,3601063,3607063,3618163,3621263,3627263,3635363,3643463, 108 3646463,3670763,3673763,3680863,3689863,3698963,3708073,3709073,3716173,3717173, 109 3721273,3722273,3728273,3732373,3743473,3746473,3762673,3763673,3765673,3768673, 110 3769673,3773773,3774773,3781873,3784873,3792973,3793973,3799973,3804083,3806083, 111 3812183,3814183,3826283,3829283,3836383,3842483,3853583,3858583,3863683,3864683, 112 3867683,3869683,3871783,3878783,3893983,3899983,3913193,3916193,3918193,3924293, 113 3927293,3931393,3938393,3942493,3946493,3948493,3964693,3970793,3983893,3991993, 114 3994993,3997993,3998993,7014107,7035307,7036307,7041407,7046407,7057507,7065607, 115 7069607,7073707,7079707,7082807,7084807,7087807,7093907,7096907,7100017,7114117, 116 7115117,7118117,7129217,7134317,7136317,7141417,7145417,7155517,7156517,7158517, 117 7159517,7177717,7190917,7194917,7215127,7226227,7246427,7249427,7250527,7256527, 118 7257527,7261627,7267627,7276727,7278727,7291927,7300037,7302037,7310137,7314137, 119 7324237,7327237,7347437,7352537,7354537,7362637,7365637,7381837,7388837,7392937, 120 7401047,7403047,7409047,7415147,7434347,7436347,7439347,7452547,7461647,7466647, 121 7472747,7475747,7485847,7486847,7489847,7493947,7507057,7508057,7518157,7519157, 122 7521257,7527257,7540457,7562657,7564657,7576757,7586857,7592957,7594957,7600067, 123 7611167,7619167,7622267,7630367,7632367,7644467,7654567,7662667,7665667,7666667, 124 7668667,7669667,7674767,7681867,7690967,7693967,7696967,7715177,7718177,7722277, 125 7729277,7733377,7742477,7747477,7750577,7758577,7764677,7772777,7774777,7778777, 126 7782877,7783877,7791977,7794977,7807087,7819187,7820287,7821287,7831387,7832387, 127 7838387,7843487,7850587,7856587,7865687,7867687,7868687,7873787,7884887,7891987, 128 7897987,7913197,7916197,7930397,7933397,7935397,7938397,7941497,7943497,7949497, 129 7957597,7958597,7960697,7977797,7984897,7985897,7987897,7996997,9002009,9015109, 130 9024209,9037309,9042409,9043409,9045409,9046409,9049409,9067609,9073709,9076709, 131 9078709,9091909,9095909,9103019,9109019,9110119,9127219,9128219,9136319,9149419, 132 9169619,9173719,9174719,9179719,9185819,9196919,9199919,9200029,9209029,9212129, 133 9217129,9222229,9223229,9230329,9231329,9255529,9269629,9271729,9277729,9280829, 134 9286829,9289829,9318139,9320239,9324239,9329239,9332339,9338339,9351539,9357539, 135 9375739,9384839,9397939,9400049,9414149,9419149,9433349,9439349,9440449,9446449, 136 9451549,9470749,9477749,9492949,9493949,9495949,9504059,9514159,9526259,9529259, 137 9547459,9556559,9558559,9561659,9577759,9583859,9585859,9586859,9601069,9602069, 138 9604069,9610169,9620269,9624269,9626269,9632369,9634369,9645469,9650569,9657569, 139 9670769,9686869,9700079,9709079,9711179,9714179,9724279,9727279,9732379,9733379, 140 9743479,9749479,9752579,9754579,9758579,9762679,9770779,9776779,9779779,9781879, 141 9782879,9787879,9788879,9795979,9801089,9807089,9809089,9817189,9818189,9820289, 142 9822289,9836389,9837389,9845489,9852589,9871789,9888889,9889889,9896989,9902099, 143 9907099,9908099,9916199,9918199,9919199,9921299,9923299,9926299,9927299,9931399, 144 9932399,9935399,9938399,9957599,9965699,9978799,9980899,9981899,9989899}; 145 int main() 146 { 147 /* int mark=0; 148 ofstream outfile("e://out_put_file.txt",ios::out); 149 for(int i=0;i<780;i++) 150 { 151 if(IsPalindrome(a[i])) 152 { 153 outfile<<a[i]<<","; 154 mark++; 155 } 156 } 157 printf("%d",mark);*/ 158 int n,m; 159 int mark=0; 160 while(scanf("%d%d",&n,&m)!=EOF) 161 { 162 if(n>m) 163 swap(n,m); 164 for(int i=0;i<800;i++) 165 { 166 if(a[i]>=n&&a[i]<=m) 167 printf("%d ",a[i]); 168 } 169 printf(" "); 170 } 171 return 0; 172 /* int mark=0; 173 ofstream outfile("e://out_put_file.txt",ios::out); 174 for(int i=1;i<=100000000;i++) 175 { 176 int result; 177 if(i>100)64552 178 { 179 result=(i)/(int)(pow(10,(int)log10(i))); 180 if(i%10!=result) 181 continue; 182 } 183 if(i>10000) 184 { 185 result=(int)(pow(10,(int)log10(i)-1)); 186 result=(i/result)%10; 187 if(((i%100)/10)!=result) 188 continue; 189 } 190 // printf("(i%100)/10)----%d ",(i%100)/10); 191 // printf("result---------%d ",result); 192 if(isPrime(i)) 193 { 194 // q[i]=i; 195 outfile<<i<<","; 196 mark++; 197 } 198 //printf("%d ",i); 199 // getchar(); 200 } 201 printf("%d ",mark);*/ 202 }