哪错了？？？？

#include <bits/stdc++.h>
using namespace std;
int main() {
	int n;
	cin>>n;
	while(n++) {
		int l, r;
		cin>>l>>r;
		long long times=(r-l+1)/9;
		long long s=times*45; 
		for(long long i=0+times*9;i<=r;i++)
			s+=(i-1)%9+1;	
		cout<<s<<endl;
	}
	return 0;
}