Submission #308468

#	Time	Username	Problem	Language	Result	Execution time	Memory
308468		ncduy0303	Trol (COCI19_trol)	C++14	50 / 50	1 ms	384 KiB

trol

#include <bits/stdc++.h>

using namespace std;

#define ar array
#define ll long long

const int MAX_N = 1e5 + 1;
const int MOD = 1e9 + 7;
const int INF = 1e9;
const ll LINF = 1e18;



void solve() {
    ll l, r; cin >> l >> r;
    ll ans = (r - l + 1) / 9 * 45;
    for (int i = 0; i < (r - l + 1) % 9; i++) {
        int tmp = (l + i) % 9;
        if (tmp == 0) tmp = 9;
        ans += tmp;
    } 
    cout << ans << "\n";
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    // freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);

    int tc; cin >> tc;
    for (int t = 1; t <= tc; t++) {
        // cout << "Case #" << t  << ": ";
        solve();
    }
}

• Subtask 1: 50 / 50