C :

#include<stdio.h>
#include<stdlib.h>
int a;
int main()
{
	scanf("%d",&a);
	if(a%100==0)
	{
		if(a%400==0)
		printf("yes");
		else 
		printf("no");
	}
	else
	{
		if(a%4==0)
		printf("yes");
		else
		printf("no");
	}
   return 0;
}

C++ :

#include<cstdio>
using namespace std;
int main()
{
	int n;
	scanf("%d",&n);
	if(n%100!=0&&n%4==0||n%400==0) 
	{
	   printf("yes");
	}
	else 
	{
		printf("no");
	}
	return 0;
}

Pascal :

var a:longint;
begin
    readln(a);
    if a mod 100=0 then
    begin
        if a mod 400=0 then writeln('yes') else writeln('no');
    end
    else
    begin
        if a mod 4=0 then writeln('yes') else writeln('no');
    end;
end.