제출 #1107421

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1107421		toast12	Trol (COCI19_trol)	C++14	10 / 50	1 ms	336 KiB

trol

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

using ll = long long;

int sum_of_digits(ll x) {
    if (x/10 == 0) return x;
    ll temp = 0;
    while (x > 0) {
        temp += x%10;
        x /= 10;
    }
    return sum_of_digits(temp);
}

int main() {
    int q;
    cin >> q;
    while (q--) {
        ll l, r;
        cin >> l >> r;
        ll ans = 0;
        ll tot = r-l;
        ll cnt = tot/10;
        ans += 1ll*45*cnt;
        ll start = sum_of_digits(l);
        ll end = sum_of_digits(r);
        if (end < start) {
            while (start <= 9) {
                ans += start;
                start++;
            }
            while (end >= 1) {
                ans += end;
                end--;
            }
        }
        else {
            while (start <= end) {
                ans += start;
                start++;
            }
        }
        cout << ans << '\n';
    }
    return 0;
}

• Subtask 1: 10 / 50