Submission #975619

#	Time	Username	Problem	Language	Result	Execution time	Memory
975619		vjudge1	Trol (COCI19_trol)	C++17	50 / 50	1 ms	348 KiB

trol

#include<bits/stdc++.h>
using namespace std;

using ll = unsigned long long;

signed main() {
	int q;
	cin >> q;

	while (q--) {
		ll l, r;
		cin >> l >> r;

		ll ans = 0;

		for (ll i = l; i <= min(r, l + 8LL); i++) {
			if (i % 9LL == 0) {
				ans += 9LL * ((r - i) / 9LL) + 9LL;
			} 
			else {
				ans += (i % 9LL) * ((r - i) / 9LL) + (i % 9LL);
			}
		}

		cout << ans << '\n';
	}
}

• Subtask 1: 50 / 50