C :

#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <time.h>
int main()
{
   // freopen("in","r",stdin);
   // freopen("out","w",stdout);



	int  year, flag;
	while(scanf("%d",&year )!=EOF){

	if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
	{
     	flag = 1;
	}
	else
	{
		flag = 0;
	}

	if (flag)
	{
     	printf("Yes\n");
	}
	else
	{
		printf("No\n");
	}

	}
  return 0;
}

C++ :

#include <cstdio>
int main()
{
	int n;
	while (scanf("%d", &n) != EOF)
	{
		if (n % 400 == 0 || (n % 4 == 0 && n % 100 != 0))
			printf("Yes\n");
		else
			printf("No\n");
	}
}

Pascal :

program ex_1;
var
 a,b,c:integer;
begin
 while not eof do
 begin
  readln(a);
  if (a mod 4=0) and (a mod 100<>0) or (a mod 400=0) then writeln('Yes')
  else writeln('No');
 end;
end.