1026 running time (15 minutes

To obtain a C language program running time, commonly used method is to call time.h header file, which provides a clock () function can be invoked when the capture time it takes to start running the program from a clock (). This time unit is clock tick, or "dot clock." At the same time there is a constant CLK_TCK, given clock hit points per second machine clock go. So in order to obtain a function  f of the running time, as long as we call  before the first call to clock f (), to obtain a clock hit points C1; in  calling clock after the completion of the implementation of f (), get another clock hit points C2; twice points of difference beat clock obtained (C2-C1) is  f clock running consumed hit points, for CLK_TCK then divided by a constant, to get a running time in units of seconds.

Here it might simply assumed constant CLK_TCK 100. Now hit points to the clock function measured before and after the two-time given, please give you time to run the test function.

Input formats:

Input gives two integers C1 and C2 sequence in a row. Note that the obtained two clock certainly not hit the same point, i.e., a C1  <C2, and the value of  [.

Output formats:

Measured output time function to run in a row. Run time must follow  hh:mm:ss(i.e., 2-bit  时:分:秒output format); less than one second to the second rounded.

Sample input:

123 4577973

Sample output:

12:42:59

#include <stdio.h> int main () {
     int A; 
    Scanf ( " % D " , & A );
     int B; 
    Scanf ( " % D " , & B); 
    A = B- A; 
    B =% A 100 ; // B is determined as rounding 
    a = a / 100 ; // a number of preliminary minutes IF (B> = 50 ) a ++; // rounding 
    the printf ( " % 02d:% 02d:% 02d " , a / 3600 , % A 3600 / 60



    
    
,a%3600%60);
    return 0;
    

}