Submission #223867

#	Time	Username	Problem	Language	Result	Execution time	Memory
223867		penguinhacker	Trol (COCI19_trol)	C++14	50 / 50	5 ms	384 KiB

trol

//TASK: Trol

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

#define ll long long

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);

	int t;
	cin >> t;
	while(t--) {
		ll l, r, n;
		cin >> l >> r;
		n = r-l+1;
		ll cycles = n/9;
		ll ans = cycles*45;
		r -= cycles*9;
		for (ll i=l; i<=r; ++i) {
			ll k = i%9;
			ans += (k==0?9:k);
		}
		cout << ans << '\n';
	}
	return 0;
}

• Subtask 1: 50 / 50