#include <bits/stdc++.h>
using namespace std;

using int32 = int_fast32_t;
using int64 = int_fast64_t;

const int32 INF = 1e9;
const int32 MOD = 1e9+7;
const int64 LLINF = 1e18;

#define YES(n) cout << ((n) ? "YES\n" : "NO\n"  )
#define Yes(n) cout << ((n) ? "Yes\n" : "No\n"  )
#define ANS(n) cout << (n) << "\n"
#define REP(i,n) for(int64 i=0;i<(n);++i)
#define FOR(i,a,b) for(int64 i=(a);i<(b);i++)
#define FORR(i,a,b) for(int64 i=(a);i>=(b);i--)
#define ALL(obj) (obj).begin(),(obj).end()
#define pii pair<int32,int32>
#define pll pair<int64,int64>
#define pb(a) push_back(a)
#define mp make_pair

int32 ans[1001] = {
    0,878,4445,8788,21122,33322,45434,56776,76667,88888,110111,122345,221122,233322,323234,343211,432332,444444,456556,545676,565566,655543,667655,765432,776767,788989,887765,987777,1001012,1101111,1122111,1212233,1232232,2101234,2122234,2221010,2233211,2322345,2334544,3210122,3223212,3234555,3332332,3344444,3434343,3445677,4321222,4333344,4345456,4443211,4454545,4544443,4556555,4567889,5443345,5455543,5545433,5556767,5654444,5666556,5677899,6545667,6565565,6655456,6667654,6678999,6776766,6788988,7665434,7676777,7766767,7778889,7877666,7889987,8767676,8787667,8877789,8898789,8998887,9887656,9987676,10000121,10101001,10121223,11010111,11110123,11123221,11221212,11233334,12111123,12123344,12222122,12234321,12323455,12343432,21010010,21110101,21122343,21221112,21233234,22111101,22123322,22222100,22233443,22323433,22343332,23211223,23223444,23321212,23333334,23345454,23434567,23454543,32110010,32122323,32221100,32233222,32323212,32334555,33211001,33223223,33234566,33332343,33344455,33434432,33454322,34321233,34333433,34345545,34443222,34454556,34544454,34556566,43210000,43222321,43234434,43332211,43344323,43433444,43445556,44321101,44333223,44344565,44434456,44454432,44544322,44555656,44567776,45443232,45454566,45544456,45556654,45654323,45665665,45677778,54323432,54343323,54433222,54444556,54456676,54554344,54565678,55433434,55445554,55543222,55554556,55566676,55656567,55676544,56543456,56555654,56567766,56665443,56676778,56766776,56778898,65433232,65444566,65456678,65554432,65566544,65655665,65667777,66543332,66555444,66566778,66656677,66676654,66766566,66778766,67654543,67666655,67678777,67776545,67788766,67878888,67899987,76554445,76566565,76655678,76667876,76765567,76777766,77654322,77665656,77677777,77767767,77787766,77877888,77898888,78767898,78787889,78878876,78899888,78999987,87665556,87677677,87767667,87787666,87877788,87898788,88767876,88787789,88878776,88898998,88999878,89887778,89987876,98765666,98777787,98876565,98888778,98988876,99877776,99898776,99998788,100012110,100112122,101000100,101100112,101121210,101212111,101232110,110001112,110101210,110122210,111011110,111111122,111123343,111222121,111233456,112112110,112210001,112222322,112234443,112332212,112344332,121011001,121111100,121123321,121221234,121233434,122111223,122123444,122222222,122234343,122332112,122343454,123212210,123232123,123322121,123333456,123345654,123443323,123455443,210011001,210111100,210123321,211012222,211112234,211211010,211223232,211234567,212121011,212211212,212223433,212321123,212333323,212345443,221012122,221112212,221210112,221223210,221234545,222112343,222211112,222223333,222321101,222333223,222344565,223221112,223233234,223323232,223334567,223432322,223444434,223456554,232112122,232210100,232222334,232234455,232332232,232344344,233212322,233232321,233322233,233334432,233432101,233443443,233455555,234323323,234343222,234432343,234444455,234456567,234554321,234565655,321010012,321110111,321122345,321221122,321233322,322111111,322123332,322222110,322233445,322323443,322343334,323211233,323223454,323321222,323333344,323345456,323443211,323454545,332110012,332122333,332221110,332233232,332323222,332334565,333211011,333223233,333321000,333332345,333344543,333434434,333454332,334322100,334333443,334345555,334443232,334454566,334544456,334556654,343210010,343222323,343234444,343332221,343344333,343433454,343445566,344321111,344333233,344344567,344434544,344454434,344544332,344555666,344567778,345443234,345455432,345544544,345556656,345654333,345665667,345677788,432111233,432123454,432222232,432234345,432332122,432343456,433212212,433232211,433322123,433334322,433345656,433443333,433455445,434323221,434334556,434432233,434444345,434456543,434545655,434565545,443211223,443223444,443321212,443333334,443345454,443434567,443454543,444322233,444334432,444432101,444443443,444455555,444545445,444556787,445432321,445444433,445456545,445545665,445565555,445655454,445666788,445678989,454332334,454344454,454434345,454454321,454543433,454555545,454567665,455434565,455454455,455544345,455556543,455567877,455665554,455677667,456545443,456556777,456654454,456666566,456678766,456767899,456787898,543221010,543233211,543322345,543334544,543432221,543444333,543455667,544323443,544343334,544433233,544444567,544456765,544554433,544566545,545433445,545445565,545543233,545554567,545566765,545656656,545676555,554322123,554334322,554345656,554443333,554455445,554544565,554556677,555432211,555444323,555455665,555545555,555565445,555654566,555666678,555678878,556554345,556566543,556655656,556667776,556765545,556777666,556789987,565443343,565455455,565544567,565556765,565654434,565666554,565677889,566545665,566565555,566655454,566666788,566678989,566776678,566788899,567665432,567676767,567766765,567778887,567877656,567889898,654323322,654343221,654432334,654444454,654456566,654545678,654565654,655433332,655445444,655456778,655554454,655566566,655656543,655667877,656543432,656555544,656567656,656656777,656676676,656766666,656778788,665432344,665444456,665456654,665554322,665565656,665655555,665667667,666543222,666554556,666566676,666656567,666676544,666765678,666777877,667654433,667666545,667677888,667767878,667787877,667878778,667899876,676554343,676565677,676655654,676667766,676765543,676777656,676789898,677665554,677677667,677767665,677787656,677877778,677898778,678767788,678787787,678878766,678898988,678999876,765443233,765454567,765544543,765556655,765654332,765665666,765677787,766545555,766565445,766654566,766666678,766678878,766776654,766788789,767656766,767676665,767766655,767778777,767876776,767888998,776544556,776556676,776654345,776666543,776677878,776767876,776787789,777656545,777667887,777765656,777777777,777876555,777888776,778766565,778778765,778876678,778888899,778988998,787655667,787667787,787765556,787777677,787789998,787887889,788766543,788777878,788876656,788888877,788988889,789877789,789898789,789998887,876545667,876565565,876655456,876667654,876678999,876776766,876788988,877665434,877676777,877766767,877778889,877877666,877889987,878767676,878787667,878877789,878898789,878998887,887656778,887676677,887766667,887778789,887876788,887889878,888767654,888778999,888877767,888898767,888998787,889878988,889987654,898765444,898776787,898789877,898887777,898987789,899876776,899888998,899989878,987656543,987667877,987765654,987777767,987876545,987888766,988766555,988777898,988876676,988888889,988988988,989877887,989898887,989998899,998776544,998788765,998878887,998899899,998999998,999887889,999988766,1000001223,1000110000,1000122321,1001011221,1001111233,1001123454,1001222232,1001234345,1010012221,1010112233,1011001001,1011101100,1011122100,1011212222,1011232221,1012101223,1012122223,1012212345,1012232344,1012322334,1012334455,1100000111,1100100123,1100121221,1101010101,1101110121,1101123211,1101221210,1101233332,1110011121,1110111211,1110123432,1111012333,1111112345,1111211122,1111223343,1112100111,1112121123,1112212110,1112232101,1112321234,1112333434,1112345554,1121012233,1121112323,1121211100,1121223321,1122100010,1122121101,1122211223,1122223444,1122321212,1122333334,1122345454,1123221223,1123233345,1123323343,1123343234,1123433211,1123444545,1123456665,1210012233,1210112323,1211001100,1211101112,1211122112,1211212234,1211232233,1212110000,1212122321,1212221011,1212233212,1212323210,1212334545,1221000123,1221101011,1221121233,1221212212,1221232211,1222101221,1222122221,1222212343,1222232334,1222322332,1222334445,1223210101,1223222343,1223234456,1223332233,1223344345,1223434322,1223445656,1232100123,1232121221,1232212122,1232232121,1232322111,1232333454,1232345566,1233222122,1233234321,1233323455,1233343432,1233433323,1233445443,1233456777,1234332332,1234344444,1234434343,1234445677,1234543345,1234555543,1234567655,2100012121,2100112211,2101000111,2101100123,2101121221,2101212122,2101232121,2110001123,2110101221,2110122221,2111011121,2111111211,2111123432,2111222210,2111234323,2112112121,2112210012,2112222333,2112234454,2112332223,2112344343,2121011012,2121111111,2121123332,2121222110,2121233445,2122111234,2122123455,2122222233,2122234432,2122332123,2122344321,2123212221,2123232212,2123322210,2123334323,2123345665,2123443334,2123455454,2210011012,2210111111,2210123332,2211012233,2211112323,2211211100,2211223321,2212100010,2212121101,2212211223,2212223444,2212321212,2212333334,2212345454,2221012211,2221112223,2221210123,2221223221,2221234556,2222121000,2222211123,2222223344,2222321112,2222333234,2222345432,2223221123,2223233323,2223323321,2223343212,2223432333,2223444445,2223456565,2232112211,2232210111,2232222345,2232234544,2232332321,2232344433,2233212333,2233232332,2233322322,2233334443,2233432112,2233443454,2233455566,2234323334,2234343233,2234433210,2234444544,2234456656,2234554332,2234565666,2321010110,2321110122,2321123212,2321221211,2321233333,2322111122,2322123343,2322222121,2322233456,2322323454,2322343345,2323212101,2323232100,2323321233,2323333433,2323345545,2323443222,2323454556,2332110110,2332122344,2332221121,2332233321,2332323233,2332343210,2333211101,2333223322,2333321011,2333333212,2333344554,2333434445,2333454343,2334322111,2334333454,2334345566,2334443321,2334455433,2334544545,2334556665,2343210100,2343222334,2343234455,2343332232,2343344344,2343434321,2343445655,2344321122,2344333322,2344345434,2344434555,2344454445,2344544343,2344555677,2344567789,2345443323,2345455443,2345544555,2345556667,2345654344,2345665678,2345677877,3210012101,3210112121,3211000012,3211100111,3211121123,3211212110,3211232101,3212101111,3212122111,3212212233,3212232232,3212322222,3212334343,3212345677,3221100010,3221121101,3221211223,3221223444,3222101010,3222121232,3222212211,3222232210,3222322122,3222334321,3222345655,3223222211,3223234332,3223332101,3223343443,3223433334,3223445454,3223456788,3232121010,3232211211,3232223432,3232321122,3232333322,3232345434,3233221211,3233233333,3233323323,3233343222,3233432343,3233444455,3233456567,3234332122,3234343456,3234433433,3234445545,3234543221,3234554555,3234566667
};


int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    int32 k;
    cin >> k;
    int32 x = k / 100 * 100;
    FOR(i,ans[x/100],3234566667+1){
        int64 n = i;
        bool flg = true;
        while(n / 10 >= 1){
            if(abs(n % 10 - (n / 10) % 10) > 1){
                flg = false;
                break;
            }
            n /= 10;
        }
        if(flg){
            if(x == k){
                ANS(i);
                return 0;
            }
            x++;
        }
    }
    return 0;
}

Measured memory_bytes: 256