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답안 #543312

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
543312 2022-03-30T06:48:12 Z AlperenT Trol (COCI19_trol) C++17
50 / 50
 1 ms 212 KB 
#include <bits/stdc++.h>

using namespace std;

long long t, l, r, ansl, ansr;

void solve(){
    cin >> l >> r;

    ansl = ((l - 1) / 9) * 45 + (((l - 1) % 9) * ((l - 1) % 9 + 1)) / 2;
    ansr = (r / 9) * 45 + ((r % 9) * (r % 9 + 1)) / 2;

    cout << ansr - ansl << "\n";
}

int main(){
    ios_base::sync_with_stdio(false);cin.tie(NULL);

    cin >> t;

    while(t--){
        solve();
    }
}

Subtask #1
50.0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct