P4942

记录

#include<bits/stdc++.h>
#define ll long long
using namespace std;
ll q_num,l,r;
int main(){
	cin>>q_num;
	for(ll s=0;s<q_num;s++){
		cin>>l>>r;
		if(l==r&&(l+r)%3==0){
			cout<<0<<endl;
			continue;
		}
		ll num=0;
		for(;l<=r;l++){
			if(l%9!=0){
				num+=l;
				num%=9;
			}
		}
		cout<<num<<endl;
	}
    return 0;
}

求求了