Submission #1172797

#	Time	Username	Problem	Language	Result	Execution time	Memory
1172797		hewfhlwejfl	Trol (COCI19_trol)	C++20	50 / 50	0 ms	328 KiB

trol

#include <iostream>
using namespace std;
#define endl '\n'
#define ll long long

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

    ll T, l, r, res, x;
    cin >> T;
    while (T--)
    {
        cin >> l >> r;
        if (r - l + 1 <= 20)
        {
            res = 0;
            for (ll i = l; i <= r; i++)
            {
                res += i % 9;
                if (i % 9 == 0) res += 9;
            }
            cout << res << endl;
            continue;
        }
        res = 0;
        for (ll i = 1; i <= r % 9; i++)
            res += i;
        x = (l % 9);
        if ((!x)) x = 9;
        for (ll i = x; i <= 9; i++)
            res += i;
        r -= r % 9;
        l += 9 - x + 1;
        if (l <= r) res += (r - l + 1) * 45 / 9;
        cout << res << endl;
    }
    return 0;
}

• Subtask 1: 50 / 50