Submission #968635

#	Time	Username	Problem	Language	Result	Execution time	Memory
968635		VMaksimoski008	Trol (COCI19_trol)	C++14	20 / 50	1 ms	348 KiB

trol

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

int main() {
    int q;
    cin >> q;

    auto Q = [&](int p) {
        if(!p) return 0ll;
        int full = p / 9;
        ll ans = full * 45;
        for(int i=full*9+1; i<=p; i++) ans += i % 9;
        return ans;
    };

    while(q--) {
        int l, r;
        cin >> l >> r;
        cout << Q(r) - Q(l-1) << '\n';
    }

    return 0;
}

• Subtask 1: 20 / 50