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\n",a[i]);
168 }
169 printf("\n");
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\n",(i%100)/10);
191 // printf("result---------%d\n",result);
192 if(isPrime(i))
193 {
194 // q[i]=i;
195 outfile<<i<<",";
196 mark++;
197 }
198 //printf("%d\n",i);
199 // getchar();
200 }
201 printf("%d\n",mark);*/
202 }
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