Submission #1243469

#	Time	Username	Problem	Language	Result	Execution time	Memory
1243469		snowysmo	Trol (COCI19_trol)	C++20	50 / 50	0 ms	328 KiB

trol

#include<bits/stdc++.h>
#define ll long long
#define endl '\n'

using namespace std;

int main(){
    int q; cin>>q;
    while(q--){
        ll l, r; cin>>l>>r;
        l--;
        ll a = (r/9)*45 + (r%9)*(r%9+1)/2;
        ll b = (l/9)*45 + (l%9)*(l%9+1)/2;
        cout<<a-b<<endl;
    }

    return 0;
}

• Subtask 1: 50 / 50