Submission #259196

#	Time	Username	Problem	Language	Result	Execution time	Memory
259196		lani1akea	Trol (COCI19_trol)	C++17	50 / 50	1 ms	384 KiB

trol

#include <bits/stdc++.h>

#define F first
#define S second
#define int long long
#define pb push_back
#define endl '\n'
#define rep(x) cout << #x << "= " << x << endl
#define OK cout << "OK\n"
using namespace std;

const int MOD = 1e9 + 7;
const int N = 510;

int get(int x) {
	int sum = x / 9 * 45;
	sum += (x%9) * (x%9 + 1) / 2;
	return sum;
}
int32_t main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	int T;
	cin >> T;
	while(T--) {
		int l, r;
		cin >> l >> r;
		cout << get(r) - get(l - 1) << endl;
	}
}

• Subtask 1: 50 / 50