제출 #974702

#제출 시각아이디문제언어결과실행 시간메모리
974702vjudge1Trol (COCI19_trol)C++14
50 / 50
1 ms348 KiB
#include<bits/stdc++.h> using namespace std; typedef long long ll; ll get_range(ll l, ll r) { l--; ll a = (l/ 9) * 45; ll b = (r / 9) * 45; for (int i = 1; i <= l % 9; i++) a += i; for (int i = 1; i <= r % 9; i++) b += i; return b - a; } int main() { ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0); int q; cin >> q; while (q--) { ll l, r; cin >> l >> r; cout << get_range(l,r) << '\n'; } return 0; }
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