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#include <iostream>
#include <string>
#include <cmath>
#include <vector>

using namespace std;

string dodaj(string s1, string s2){
    string s3 = "";
    for (int i=0; i<min(s1.length(),s2.length()); i++){
        int x = (s1[i]-48)+s2[i];
        s3 += x;
        if (x-48 > 9){
            s3[i] = ((x-48)%10)+48;
            s3 += (x-48)/10+48;
        }
        s3 += '0';
        if (s1.length() >= s2.length()){
            for (int i=min(s1.length(),s2.length()); i<s1.length(); i++){
                s3[i] += (s1[i]-48);
                x = s3[i];
                if (x-48 > 9){
                    s3[i] = ((x-48)%10)+48;
                    s3 += (x-48)/10+48;
                }
                s3 += '0';
            }
        }
        else{
            for (int i=min(s1.length(),s2.length()); i<s2.length(); i++){
                s3[i] += (s2[i]-48);
                x = s3[i];
                if (x-48 > 9){
                    s3[i] = ((x-48)%10)+48;
                    s3 += (x-48)/10+48;
                }
                s3 += '0';
            }
        }
    }
    string wynik = "";
    int wsk = 0;
    for (int i=s3.length()-1; i>=0; i--){
        if (s3[i] == '0'){
            wsk++;
        }
        else break;
    }
    for (int i=0; i<s3.length()-wsk; i++){
        wynik += s3[i];
    }
    return wynik;
}

string mnoz(string s1, string s2){
    string wynik = "0";
    string mn = "";
    for (int i=0; i<s2.length(); i++){
        string pom = "0";
        for (int j=0; j<s2[i]-48; j++){
            pom = dodaj(pom,s1);
        }
        wynik = dodaj(wynik,mn+pom);
        mn += "0";
    }
    return wynik;
}


long long int m=0, mp=0, r=0, rp=1, nwdw=0;

void NWD(long long int a, long long int b){
    if(b==0){
        nwdw=a;
        r=a;
        return;
    }
    else NWD(b,a%b);

    long long int t=mp;
    mp=(rp-floor(a/b)*mp);
    m=b;
    rp=t;
    r=a;
}

void pot(long long int n, long long int T[2][2], long long int mod){
    if (n == 0){
        T[0][0] = 1;
        T[0][1] = 0;
        T[1][0] = 0;
        T[1][1] = 1;
    }
    if (n>1){
        long long int T1[2][2];
        for (int i=0; i<2; i++){
            for (int j=0; j<2; j ++){
                T1[i][j] = T[i][j];
            }
        }
        pot(n/2,T1,mod);
        long long int T2[2][2];
        T2[0][0] = (T1[0][0]*T1[0][0]+T1[0][1]*T1[1][0])%mod;
        T2[1][0] = (T1[1][0]*T1[0][0]+T1[1][1]*T1[1][0])%mod;
        T2[0][1] = (T1[0][0]*T1[0][1]+T1[0][1]*T1[1][1])%mod;
        T2[1][1] = (T1[1][0]*T1[0][1]+T1[1][1]*T1[1][1])%mod;
        if (n%2 == 1){
            long long int T3[2][2];
            T3[0][0] = (T2[0][0]*T[0][0]+T2[0][1]*T[1][0])%mod;
            T3[1][0] = (T2[1][0]*T[0][0]+T2[1][1]*T[1][0])%mod;
            T3[0][1] = (T2[0][0]*T[0][1]+T2[0][1]*T[1][1])%mod;
            T3[1][1] = (T2[1][0]*T[0][1]+T2[1][1]*T[1][1])%mod;
            for (int i=0; i<2; i++){
                for (int j=0; j<2; j++){
                    T[i][j] = T3[i][j];
                }
            }
        }
        else{
            for (int i=0; i<2; i++){
                for (int j=0; j<2; j++){
                    T[i][j] = T2[i][j];
                }
            }
        }
    }
    for (int i=0; i<2; i++){
        for (int j=0; j<2; j++){
            if (T[i][j] < 0) T[i][j] += mod;
        }
    }

}

long long int fib(long long int n, long long int mod){
    long long int T[2][2] = {{1,1},{1,0}};
    pot(n,T,mod);
    return T[1][0];
}

int main()
{
    int n;
    string s;
    cin >> s;
    n = s.length();
    long long int k = 0;
    long long int mn = 1;
    for (int i=1; i<=n; i++){
        k += mn*(s[n-i]-48);
        mn *= 10;
    }

    long long int pot = min(n,n/2+1);
    long long int mod1 = 1;
    long long int mod2 = 1;
    for (int i=0; i<pot; i++){
        mod1 *= 2;
        mod2 *= 5;
    }

    long long int k2 = k%mod1;
    long long int k5 = k%mod2;

    vector <long long int>dw;
    vector <long long int>pt;

    long long int f1 = 0;
    long long int f2 = 1;
    long long int wsk2 = 0;

    while (!(f1 == 0 && f2 == 1 && wsk2 != 0)){
        if (f1 == k2) dw.push_back(wsk2);
        long long int pom = (f1 + f2)%mod1;
        f1 = f2;
        f2 = pom;
        wsk2++;
    }


    f1 = 0;
    f2 = 1;
    long long int wsk5 = 0;

    while (!(f1 == 0 && f2 == 1 && wsk5 != 0)){
        if (f1 == k5) pt.push_back(wsk5);
        long long int pom = (f1 + f2)%mod2;
        f1 = f2;
        f2 = pom;
        wsk5++;
    }

    mod1 = 1;
    mod2 = 1;
    for (int i=0; i<n; i++){
        mod1 *= 2;
        mod2 *= 5;
    }

    k2 = k%mod1;
    k5 = k%mod2;

    long long int ws2 = 3*mod1/2;
    long long int ws5 = 4*mod2;

    vector <long long int>ost2;
    vector <long long int>ost5;

    for (int i=0; i<ws2/wsk2; i++){
        for (int j=0; j<dw.size(); j++){
            if (fib(dw[j],mod1) == k2) ost2.push_back(dw[j]);
            dw[j] += wsk2;
        }
    }

    for (int i=0; i<ws5/wsk5; i++){
        for (int j=0; j<pt.size(); j++){
            if (fib(pt[j],mod2) == k5) ost5.push_back(pt[j]);
            pt[j] += wsk5;
        }
    }

    long long int nwd = 1;
    if (n<3){
        for (int i=0; i<n-1; i++){
            nwd *= 2;
        }
    }
    else nwd = 4;

    bool czy = 0;
    for (int i=0; i<ost2.size(); i++){
        for (int j=0; j<ost5.size(); j++){
            if (abs(ost2[i]-ost5[j])%nwd == 0 && czy == 0){
                czy = 1;
                NWD(ws2/nwd,ws5/nwd);
                string s[4];
                long long int l[4];
                l[0] = abs(ost2[i]-ost5[j]);
                l[1] = abs(mp);
                l[2] = ws5/nwd;
                l[3] = ost5[j];
                cout << l[0]*l[1]*l[2]+l[3];





            }
        }

    }
    if (czy == 0) cout << "NIE";





}