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답안 #974648

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
974648 2024-05-03T15:02:25 Z 12345678 Trol (COCI19_trol) C++17
50 / 50
 1 ms 348 KB 
#include <bits/stdc++.h>

using namespace std;

#define ll long long

ll q, l, r, qs[10];

ll solve(ll x)
{
    return (x/9)*45+qs[x%9];
}

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>q;
    for (int i=1; i<=9; i++) qs[i]=qs[i-1]+i;
    while (q--) cin>>l>>r, cout<<solve(r)-solve(l-1)<<'\n';
}

Subtask #1
50.0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct