#include <iostream>
 #include <sstream>
 using namespace std;
 
 /** 
    Converts an integer value to a string, e.g. 3 -> "3".
    @param s an integer value
    @return the equivalent string
 */   
 string int_to_string(int n)
 {  ostringstream outstr;
    outstr << n;
    return outstr.str();
 }
 /**
    Reads a time from standard input in the format hh:mm or 
    hh:mm am or hh:mm pm
    @param hours filled with the hours
    @param minutes filled with the minutes
 */
 void read_time(int& hours, int& minutes)
 {  string line;
    getline(cin, line);
    istringstream instr(line);
 
    instr >> hours;
    minutes = 0;
 
    char ch;
    instr.get(ch);
    if (ch == ':') instr >> minutes;
    else instr.unget();
 
    string suffix;
    instr >> suffix;
 
    if (suffix == "pm") hours = hours + 12;
 }
 /** 
    Computes a string representing a time.
    @param hours the hours (0...23)
    @param minutes the minutes (0...59)
    @param military true for military format, 
    false for am/pm format,                
 */
 string time_to_string(int hours, int minutes, bool military)
 {  string suffix;
    if (!military)
    {  if (hours < 12) suffix = "am";
       else
       {  suffix = "pm";
          hours = hours - 12;
       }
       if (hours == 0) hours = 12;
    }
    string result = int_to_string(hours) + ":";
    if (minutes < 10) result = result + "0";
    result = result + int_to_string(minutes);
    if (!military) result = result + " " + suffix;
    return result;
 }
 
 int main()
 {  cout << "Please enter the time: ";
 
    int hours;
    int minutes;
    read_time(hours, minutes);
 
    cout << "Military time: " 
       << time_to_string(hours, minutes, true) << "\n";
    cout << "Using am/pm:   " 
       << time_to_string(hours, minutes, false) << "\n";
 
    return 0;
 }