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Submission #871615

# Submission time Handle Problem Language Result Execution time Memory
871615 2023-11-11T07:46:29 Z vjudge1 Trol (COCI19_trol) C++17
50 / 50
 1 ms 348 KB 
//author: Ahmet Alp Orakci
#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
#define int i64

#define ONLINE_JUDGE
void solve() {
    int l, r;
    cin >> l >> r;

    auto solver = [&](int x) -> int {
        int a = x % 9;
        return 45 * (x / 9) + (a * (a +1) / 2);
    };

    cout << solver(r) - solver(l -1) << "\n";
    
    return;
}

signed main() {
    #ifndef ONLINE_JUDGE
        freopen(".in", "r", stdin);
        freopen(".out", "w", stdout);
    #endif

    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

    int t = 1; cin >> t;
    for(int i = 1; i <= t; i++) {
        solve();
    }

    return 0;
}

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct