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    #include <sstream>
    #include <iostream>
    using namespace std;
    string ZeroPadNumber(int num){
        stringstream ss;
        // the number is converted to string with the help of stringstream
        ss << num;
        string ret;
        ss >> ret;
        // Append zero chars
        int str_length = ret.length();
        for (int i = 0; i < 2 - str_length; i++)
            ret = "0" + ret;
        return ret;
        }
    void EasterDate(int X){                             // X = year to compute
        int K, M, S, A, D, R, OG, SZ, OE;
        K  = X / 100;                                   // Secular number
        M  = 15 + (3 * K + 3) / 4 - (8 * K + 13) / 25;  // Secular Moon shift
        S  = 2 - (3 * K + 3) / 4;                       // Secular sun shift
        A  = X % 19;                                    // Moon parameter
        D  = (19 * A + M) % 30;                         // Seed for 1st full Moon in spring
        R  = D / 29 + (D / 28 - D / 29) * (A / 11);     // Calendarian correction quantity
        OG = 21 + D - R;                                // Easter limit
        SZ = 7 - (X + X / 4 + S) % 7;                   // 1st sunday in March
        OE = 7 - (OG - SZ) % 7;                         // Distance Easter sunday from Easter limit in days
        //Easter = DateSerial(X, 3, OG + OE);           // Result: Easter sunday as number of days in March
        cout << X << "-" << ZeroPadNumber(((OG + OE)>31)?4:3) << "-" << ZeroPadNumber((((OG + OE)%31)==0)?31:((OG + OE)%31));
        }
    int main ()
    {
        int year;
        do {
            cout << "Put the year: ";
            cin >> year;
            EasterDate(year);
            cout << endl << endl;
            }
        while (year>0);
        return 0;
    }