Teacher’s day is celebrated each year on the first sunday of the october. given natural number n, that

represents the number of the year. output the date of the teacher’s day of that year.

example:

input:

2010

output

3
с++​

ответ:

#define _crt_secure_no_warnings

#include

#include

using namespace std;

int main()

{

  int y;

  char buffer[80];

  cout < < "year = ";

  cin > > y;

  tm time_in;

  time_in.tm_sec = 0;   // second

  time_in.tm_min = 0;   // minute

  time_in.tm_hour = 0; // hour

  time_in.tm_mday = 1; // 1-based day

  time_in.tm_mon = 9;   // 0-based month

  time_in.tm_year = y - 1900; // year since 1900

  time_t time_temp = mktime (& time_in);   // convert the local time to a calendar value.

  tm* time_out = localtime (& time_temp);   // converts a time_t time value to a tm structure

  if (time_out-> tm_wday > 0)               // if it is not sunday, go to the next sunday

    time_out-> tm_mday += 7 - time_out-> tm_wday;

  strftime(buffer, 80, "%d.%m.%y", time_out);   // date formatting for output

  cout < < "\nteachers day is " < < buffer < < "\n";

}

объяснение: explanations in the comments to the program

program p_1

var

a: string

begin

writeln ('vvedite nazvanie rek');

read (a);

if (a='волга,днепро,нёман,енисей')then

writeln ('в беларуси протекают только днепро,нёман');

end.