a4 = []
a7 = []
ans = []
 
def add (a4,a7,l,r)
sum4 = 0
sum7 = 0
(l..r).each { |i|
sum4 = sum4 + a4[i]
sum7 = sum7 + a7[i]
}
if(sum4 == sum7)
return 1
end
return 0
 
end
t = gets.to_i
len = 0
(1..t).each {
n = gets.to_i
(len+1..n).each {|i|
a4[i] = i.to_s.count('4')
a7[i] = i.to_s.count('7')
len = len + 1
}
 
count = 0
(1..n).each { |l|
(l..n).each{ |r|
if ans.empty?
count = count + add(a4,a7,l,r)
else
count = count + ans[l-1]
end
}
}
ans << count
print "#{count}\n"
} 

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

MgoxCjI=

2
1
2