Add Day Of Programmer

HackerRank/DayOfProgrammer.cpp

@@ -0,0 +1,43 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+string ltrim(const string &);
+string rtrim(const string &);
+
+string dayOfProgrammer(int y) {
+    int d = 13;
+    if(!(y%4) && (y < 1918 || y%100 || !(y%400))) d--;
+    if(y == 1918) d = 26;
+    return to_string(d) + ".09." + to_string(y);
+}
+
+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;
+}