Submission #871615

#	Time	Username	Problem	Language	Result	Execution time	Memory
871615		vjudge1	Trol (COCI19_trol)	C++17	50 / 50	1 ms	348 KiB

trol

//author: Ahmet Alp Orakci
#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
#define int i64

#define ONLINE_JUDGE
void solve() {
    int l, r;
    cin >> l >> r;

    auto solver = [&](int x) -> int {
        int a = x % 9;
        return 45 * (x / 9) + (a * (a +1) / 2);
    };

    cout << solver(r) - solver(l -1) << "\n";
    
    return;
}

signed main() {
    #ifndef ONLINE_JUDGE
        freopen(".in", "r", stdin);
        freopen(".out", "w", stdout);
    #endif

    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

    int t = 1; cin >> t;
    for(int i = 1; i <= t; i++) {
        solve();
    }

    return 0;
}

• Subtask 1: 50 / 50