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- #include<iostream>
- using namespace std;
- int main()
- {
- int a,b,n,sum=0;
- cin>>n;
- for(int i=0; i<n; i++)
- {
- cin>>a>>b;
- for(int j=a; j<=b; j=j+2)
- {
- sum=sum+j;
- }
- cout<<sum<<endl;
- }
- }
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