求助大佬们看看为什么不能ac。

#include<stdio.h>
#include<stdlib.h>
int main()
{
int n,year,month,day;
int a[lbk][rbk]={0,31,28,31,30,31,30,31,31,30,31,30,31};
scanf("%d",&n);
while(n--)
{int sum = 0;
scanf("%d %d %d",&year,&month,&day);
if(((year%4==0)&&(year%100!=0))||(year%400==0))
{
a[lbk]2[rbk]=29;
}int i;
for(i=0;i<month;i++)
{
sum+=a[lbk]i[rbk];
}printf("%d\n",sum+day);
}return 0;
}