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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- long long int a,b,c,d,e,f,i,j,k,t;
- cin>>t;
- while(t--)
- {
- d=0;
- cin>>a>>b;
- for(i=a; i<=b; i++)
- {
- c=i%10;
- if(c==2 || c==3 || c==9)
- {
- d++;
- }
- }
- cout<<d<<endl;
- }
- return 0;
- }
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