Program to find the time after K minutes from given time

0 0 4 minutes read

You are given a time T in 24-hour format (hh:mm) and a positive integer K, you have to tell the time after K minutes in 24-hour time.
Examples:

Input: T = 12:43, K = 21
Output: 13:04

Input: T = 20:39, K = 534
Output: 05:33

Approach:

Convert the given time in minutes
Add K to it let it be equal to M.
Convert the M minutes in 24 hours format accordingly.

C++

#include <bits/stdc++.h> 
using namespace std; 
    
// function to obtain the new time 
void findTime(string T, int K) 
{ 
    
    // convert the given time in minutes 
    int minutes = ((T[0] - '0') 
                       * 10 
                   + T[1] - '0') 
                      * 60 
                  + ((T[3] - '0') 
                         * 10 
                     + T[4] - '0'); 
    
    // Add K to current minutes 
    minutes += K; 
    
    // Obtain the new hour 
    // and new minutes from minutes 
    int hour = (minutes / 60) % 24; 
    
    int min = minutes % 60; 
    
    // Print the hour in appropriate format 
    if (hour < 10) { 
        cout << 0 << hour << ":"; 
    } 
    else { 
        cout << hour << ":"; 
    } 
    
    // Print the minute in appropriate format 
    if (min < 10) { 
        cout << 0 << min; 
    } 
    else { 
        cout << min; 
    } 
} 
    
// Driver code 
int main() 
{ 
    
    string T = "21:39"; 
    
    int K = 43; 
    
    findTime(T, K); 
}

Java

// Java program of above approach 
class GfG { 
    
// function to obtain the new time  
static void findTime(String T, int K)  
{  
    
    // convert the given time in minutes  
    int minutes = ((T.charAt(0) - '0')  
                    * 10
                + T.charAt(1) - '0')  
                    * 60
                + ((T.charAt(3) - '0')  
                        * 10
                    + T.charAt(4) - '0');  
    
    // Add K to current minutes  
    minutes += K;  
    
    // Obtain the new hour  
    // and new minutes from minutes  
    int hour = (minutes / 60) % 24;  
    
    int min = minutes % 60;  
    
    // Print the hour in appropriate format  
    if (hour < 10)  
    {  
        System.out.print("0" + hour + ":");  
    }  
    else 
    {  
        System.out.print(hour + ":");  
    }  
    
    // Print the minute in appropriate format  
    if (min < 10)  
    {  
        System.out.println("0" + min);  
    }  
    else 
    {  
        System.out.println(min);  
    }  
}  
    
// Driver code  
public static void main(String[] args)  
{  
    
    String T = "21:39";  
    int K = 43;  
    findTime(T, K);  
}  
} 
    
// This code is contributed by Prerna Saini

Python3

# Python3 program for given approach 
    
# function to obtain the new time 
def findTime(T, K): 
        
    # convert the given time in minutes 
    minutes = (((ord(T[0]) - ord('0'))* 10 + 
                 ord(T[1]) - ord('0'))* 60 + 
               ((ord(T[3]) - ord('0')) * 10 + 
                 ord(T[4]) - ord('0'))); 
                    
    # Add K to current minutes 
    minutes += K 
    
    # Obtain the new hour 
    # and new minutes from minutes 
    hour = (int(minutes / 60)) % 24
    
    min = minutes % 60
    
    # Print the hour in appropriate format 
    if (hour < 10): 
        print(0, hour, ":", end = " ") 
    
    else: 
        print(hour, ":", end = " ") 
    
    # Print the minute in appropriate format 
    if (min < 10): 
        print(0, min, end = " ") 
    
    else: 
        print(min,end = " ") 
    
# Driver code 
if __name__ == '__main__': 
    T = "21:39"
    
    K = 43
    
    findTime(T, K) 
        
# This code is contributed by 
# Surendra_Gangwar

C#

// C# program of above approach 
using System; 
    
class GfG 
{ 
        
    // function to obtain the new time  
    static void findTime(string T, int K)  
    {  
        
        // convert the given time in minutes  
        int minutes = ((T[0] - '0')  
                        * 10 
                    + T[1] - '0')  
                        * 60 
                    + ((T[3] - '0')  
                            * 10 
                        + T[4] - '0');  
        
        // Add K to current minutes  
        minutes += K;  
        
        // Obtain the new hour  
        // and new minutes from minutes  
        int hour = (minutes / 60) % 24;  
        
        int min = minutes % 60;  
        
        // Print the hour in appropriate format  
        if (hour < 10)  
        {  
            Console.Write("0" + hour + ":");  
        }  
        else
        {  
            Console.Write(hour + ":");  
        }  
        
        // Print the minute in appropriate format  
        if (min < 10)  
        {  
            Console.Write("0" + min);  
        }  
        else
        {  
            Console.Write(min);  
        }  
    }  
    // function to obtain the new time  
        
    // Driver code  
    public static void Main()  
    {  
        
        string T = "21:39";  
        int K = 43;  
        findTime(T, K);  
    }  
} 
    
// This code is contributed by ihritik

PHP

<?php 
// PHP program of above approach 
    
// function to obtain the new time 
function findTime($T, $K) 
{ 
    
    // convert the given time in minutes 
    $minutes = (($T[0] - '0') * 10 + $T[1] - '0') * 60 +  
               (($T[3] - '0') * 10 + $T[4] - '0'); 
    
    // Add K to current minutes 
    $minutes += $K; 
    
    // Obtain the new hour 
    // and new minutes from minutes 
    $hour = (int)($minutes / 60) % 24; 
    
    $min = $minutes % 60; 
    
    // Print the hour in appropriate format 
    if ($hour < 10)  
    { 
        echo 0 . $hour . ":"; 
    } 
    else
    { 
        echo $hour . ":"; 
    } 
    
    // Print the minute in appropriate format 
    if ($min < 10)  
    { 
        echo 0 . $min; 
    } 
    else
    { 
        echo $min; 
    } 
} 
    
// Driver code 
$T = "21:39"; 
    
$K = 43; 
    
findTime($T, $K); 
    
// This code is contributed by Akanksha Rai 
?>

Javascript

<script> 
  
// Javascript program of above approach 
  
// function to obtain the new time 
  
    function findTime(T,  K)  
    {  
  
     // convert the given time in minutes 
    var minutes =  ((Number(T[0]) - '0') * 10  +  
                     Number(T[1]) - '0')  * 60 +  
                    (( Number(T[3]) - '0') * 10 +  
                       Number(T[4]) - '0')  ; 
        
        // Add K to current minutes 
        minutes += K;  
        
        // Obtain the new hour 
        // and new minutes from minutes 
        var hour = (minutes / 60) % 24;  
        
        var min = minutes % 60;  
        
        // Print the hour in appropriate format 
        if (hour < 10)  
        {  
            document.write("0" + hour + ":");  
        }  
        else
        {  
            document.write(hour.toFixed() + ":");  
        }  
        
        // Print the minute in appropriate format 
        if (min < 10)  
        {  
            document.write("0" + min);  
        }  
        else
        {  
            document.write(min);  
        }  
    }  
    // function to obtain the new time 
        
    // Driver code 
  
        
        var T = "21:39";  
        var K = 43;  
        findTime(T, K);  
          
</script>

Output:

22:22

Time Complexity: O(1)
Auxiliary Space: O(1)

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