HackerRank>Algorithm>implementation>dayOfProgrammer

dayOfProgrammer.cpp

#include <bits/stdc++.h>

using namespace std;

bool isLeap(int year);
string ltrim(const string &);
string rtrim(const string &);

// Complete the dayOfProgrammer function below.
string dayOfProgrammer(int year) {
    if( year == 1918 ) return "26.09.1918";
    if( isLeap( year ) ) return "12.09." + std::to_string(year);
    else return "13.09." + std::to_string(year);

}

bool isLeap( int year ) {
    if( year % 4 != 0 ) return false;
    if( year > 1918 && year % 100 == 0 && year % 400 != 0 ) return false;
    return true;
}

int main()
{
    ofstream fout(getenv("OUTPUT_PATH"));

    string year_temp;
    getline(cin, year_temp);

    int year = stoi(ltrim(rtrim(year_temp)));

    string result = dayOfProgrammer(year);

    fout << result << "\n";

    fout.close();

    return 0;
}

string ltrim(const string &str) {
    string s(str);

    s.erase(
        s.begin(),
        find_if(s.begin(), s.end(), not1(ptr_fun<int, int>(isspace)))
    );

    return s;
}

string rtrim(const string &str) {
    string s(str);

    s.erase(
        find_if(s.rbegin(), s.rend(), not1(ptr_fun<int, int>(isspace))).base(),
        s.end()
    );

    return s;
}