int main(void) {

	char username[20];
	char password[20];


	printf("Welcome !\n\n\n");
	printf("LOGIN \n\n");

	printf("Username : ");
	scanf("%s",&username);
	printf("Password : ");
	scanf("%s",&password);
		while ((username!="maths" && password!="123a") || (username!="stats" && password!="4321"))
			{
                    printf("Username : ");
					scanf("%s",&username);
					printf("Password : ");
					scanf("%s",&password);
			}


	return 0;
}