oj.uz

답안 #976633

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
976633 2024-05-06T23:36:08 Z vjudge1 Trol (COCI19_trol) C++17
30 / 50
 1 ms 348 KB 
#include <iostream>
#include <cmath>
using namespace std;

const int SUM = 45;

int main() {
    int q;
    unsigned long long l, r, a, b;
    unsigned long long ans;
    cin >> q;
    while (q--) {
        cin >> l >> r;
        if (l == r) {
            cout << (l % 9 ? l % 9 : 9) << '\n';
            continue;
        }
        a = floor((l - 1)/9.0);
        b = floor((r - 1)/9.0);
        ans = SUM * (b - a);
        a = l%9 ? l%9 : 9;
        b = r%9 ? r%9 : 9;
        ans -= (a)*(a - 1) / 2;
        ans += (b)*(b + 1) / 2;
        cout << ans << '\n';
    }
}

Subtask #1
30.0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Incorrect 1 ms 348 KB Output isn't correct
4 Correct 1 ms 348 KB Output is correct
5 Incorrect 1 ms 348 KB Output isn't correct