
int main()
{
	int stu_num,stop_num,i,j;
	int stop[100][100]={0},sum[100]={0},time[100][100]={0};  
	scanf("%d",&stu_num);
	for(i=1;i<=stu_num;i++)
	{
		scanf("%d",&stop_num);
		if(stop_num==0)
		{
			sum[i]=60;
		}
		else
		{
			for(j=1;j<=stop_num;j++)
			{
				scanf("%d",&stop[i][j]);
			}
			for(j=stop_num;j>=1;j--)
			{
				time[i][j]=stop[i][j]+(j-1)*3;
				if(time[i][j]>60)
				{
					continue;
				}
				else if(time[i][j]<=57)
				{
					sum[i]=60-3*j;
				}
				else
				{
					sum[i]=time[i][j]-3*(j-1);
				}
				break;
			}
		}
	}
	for(i=1;i<=stu_num;i++)
	{
		printf("%d\n",sum[i]);
	}
	return 0;
}
	