素数回文 ---- 有点暴力.....

  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 }