Submission #543312

#	Time	Username	Problem	Language	Result	Execution time	Memory
543312		AlperenT	Trol (COCI19_trol)	C++17	50 / 50	1 ms	212 KiB

trol

#include <bits/stdc++.h>

using namespace std;

long long t, l, r, ansl, ansr;

void solve(){
    cin >> l >> r;

    ansl = ((l - 1) / 9) * 45 + (((l - 1) % 9) * ((l - 1) % 9 + 1)) / 2;
    ansr = (r / 9) * 45 + ((r % 9) * (r % 9 + 1)) / 2;

    cout << ansr - ansl << "\n";
}

int main(){
    ios_base::sync_with_stdio(false);cin.tie(NULL);

    cin >> t;

    while(t--){
        solve();
    }
}

• Subtask 1: 50 / 50