Little Elephant and Lucky Segment

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The Little Elephant from the Zoo of Lviv likes lucky digits. Everybody knows that the lucky digits are digits 4 and 7.
This time he has an array A that consists of N integers: A[1], A[2], ..., A[N]. Let F4(x) be the number of digits 4 in the decimal representation of x, and F7(x) be the number of digits 7 in the decimal representation of x. For example, F4(5) = 0, F4(4467) = 2 and F7(457747) = 3.
Consider some pair of integers L and R such that 1 ≤ L ≤ R ≤ N. Let C4 be the total number of digits 4 in decimal representation of integers A[L], A[L + 1] ..., A[R], i. e.,
C4 = F4(A[L]) + F4(A[L + 1]) + ... + F4(A[R]).
Similarly, let C7 be the the total number of digits 7 in decimal representation of integers A[L], A[L + 1] ..., A[R], i. e.,
C7 = F7(A[L]) + F7(A[L + 1]) + ... + F7(A[R]).
The Little Elephant wants to know the number of such pairs (L; R) for which C4^{C7} ≤ R − L + 1. But he believes that the number 2 is unlucky. Hence he discards all pairs where C4 = 2 or C7 = 2.
Help the Little Elephant to find the answer for the problem.
Remark. 0^{0} = 1. It is a standard mathematical definition.
Input
The first line of the input contains a single integer T, the number of test cases. Then T test cases follow. The first line of each test case contains a single integer N, the size of the array A for the corresponding test case. The second line contains N space separated integers A[1], A[2], ..., A[N].
Output
For each test case output a single line containing the answer for the corresponding test case.
Constraints
1 ≤ T ≤ 3
1 ≤ N ≤ 10^{5}
1 ≤ A[i] ≤ 10^{9}
Example
Input: 3 3 1 2 1 4 47 2 4 77548 1 777 Output: 6 5 1
Explanation
Case 1. Here C4 = C7 = 0 for all pairs (L; R). So 0^{0} = 1 ≤ R − L + 1 for each pair. There are 6 pairs (L; R) in all: (1; 1), (1; 2), (1; 3), (2; 2), (2; 3), (3; 3). So the answer is 6.
Case 2. Here we have 10 pairs of (L; R) in all. Consider them all.
 L = 1, R = 1: C4 = 1, C7 = 1, C4^{C7} = 1^{1} = 1 ≤ 1 = R − L + 1. The pair is counted.
 L = 1, R = 2: C4 = 1, C7 = 1, C4^{C7} = 1^{1} = 1 ≤ 2 = R − L + 1. The pair is counted.
 L = 1, R = 3: C4 = 2, C7 = 1, C4^{C7} = 2^{1} = 2 ≤ 3 = R − L + 1. But the pair is not counted since C4 = 2.
 L = 1, R = 4: C4 = 3, C7 = 3, C4^{C7} = 3^{3} = 27 > 4 = R − L + 1. The pair is not counted.
 L = 2, R = 2: C4 = 0, C7 = 0, C4^{C7} = 0^{0} = 1 ≤ 1 = R − L + 1. The pair is counted.
 L = 2, R = 3: C4 = 1, C7 = 0, C4^{C7} = 1^{0} = 1 ≤ 2 = R − L + 1. The pair is counted.
 L = 2, R = 4: C4 = 2, C7 = 2, C4^{C7} = 2^{2} = 4 > 3 = R − L + 1. The pair is not counted. It is also not counted since C4 = 2, and also since C7 = 2.
 L = 3, R = 3: C4 = 1, C7 = 0, C4^{C7} = 1^{0} = 1 ≤ 1 = R − L + 1. The pair is counted.
 L = 3, R = 4: C4 = 2, C7 = 2, C4^{C7} = 2^{2} = 4 > 2 = R − L + 1. The pair is not counted. It is also not counted since C4 = 2, and also since C7 = 2.
 L = 4, R = 4: C4 = 1, C7 = 2, C4^{C7} = 1^{2} = 1 ≤ 1 = R − L + 1. But the pair is not counted since C7 = 2.
As we see there are exactly 5 pairs (L; R) that satisfy required constraints.
Case 3. Here we have the only pair (L; R) = (1; 1) for which C4 = 0, C7 = 3 and C4^{C7} = 0^{3} = 0 ≤ 1 = R − L + 1. So it is counted, and the answer is 1.
Author:  witua 
Tags  binarysearch, cook28, maths, mediumhard, witua 
Date Added:  6062012 
Time Limit:  5 sec 
Source Limit:  50000 Bytes 
Languages:  C, CPP14, JAVA, PYTH, PYTH 3.6, CS2, PAS fpc, PAS gpc, RUBY, PHP, GO, NODEJS, HASK, SCALA, D, PERL, FORT, WSPC, ADA, CAML, ICK, BF, ASM, CLPS, PRLG, ICON, SCM qobi, PIKE, ST, NICE, LUA, BASH, NEM, LISP sbcl, LISP clisp, SCM guile, JS, ERL, TCL, PERL6, TEXT, PYP3, CLOJ, FS 
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