int？ Master ()

{

int？ Year, n = 0；;

For (? Year =1; Year & lt=3000; Year++? )

{

What if? (? (Year %4==0? & amp& amp？ Year% 100! =0)? ||? Year %400==0? )

n++；

}

printf("n=%d\n "，n？ );

Return? 0;

}