int main()
{
	int n, i,j,t1,t2,k,m,s[20],a=60;
	scanf("%d",&n);
	for(i=0;i<n;i++){
		scanf("%d",&m);
if(m==0) printf("%d\n",a);
else{
		for(j=1;j<=m;j++){
			scanf("%d",&s[j]);
			t1=s[j]+3*(j-1);
			t2=s[j]+3*j;
			if(t2<=60) k=s[j]+60-t2;
			else if (t1<=60) k=s[j];}
		printf("%d\n",k);}
}
    return 0;
}
