제출 #1258671

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1258671		thanz	Trol (COCI19_trol)	C++20	0 / 50	0 ms	328 KiB

trol

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pll pair<ll, ll>
#define pii pair<int, int>
#define fs first
#define sc second
#define pb push_back
#define int ll

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int q;
    cin >> q;
    while (q--)
    {
        int l, r;
        cin >> l >> r;
        l--;
        int a = l / 9, b = l % 9, n = r / 9, m = r % 9;
        int suml = (a * (a + 1) / 2) + (b * (b + 1) / 2), sumr = (n * (n + 1) / 2) + (m * (m + 1) / 2);
        // cout << sumr << " " << suml << " ";
        cout << sumr - suml << "\n";
    }
}

• Subtask 1: 0 / 50