
int main()
{
int n,a,i,j,k,tiaohuai,b[20],count=0;
 scanf("%d",&n);
 for(a=0;a<n;a++)
 {
	 scanf("%d",&tiaohuai);
	 if(tiaohuai==0)
	 { printf("60\n");
	     continue;
	 }
	 for(i=0,k=0;i<tiaohuai;i++,k++)
	 {
		 scanf("%d",&b[i]);
	 }
for(i=0,k=0;i<tiaohuai;i++,k++)
{
		 count=b[i]+3*i;
	     if(count>60)
		 {
			 j=60-3*i;
			 printf("%d\n",j);
			 break;
		 }
		 count=count+3;
		 if(count>60)
		 {
			 printf("%d\n",b[i]);
			 break;
		 }
	 }
		 if(count<60)
		 {
			 printf("%d\n",60-tiaohuai*3);
		 }
     
 }
 return 0;      
}