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Submission #487607

# Submission time Handle Problem Language Result Execution time Memory
487607 2021-11-16T09:31:58 Z KazamaHoang Trol (COCI19_trol) C++14
50 / 50
 1 ms 312 KB 
#include <bits/stdc++.h>

using namespace std;

int main() {
    cin.tie(0)->sync_with_stdio(0);
    int ntest;
    for (cin >> ntest; ntest --;) {
        long long l, r;
        cin >> l >> r;

        auto f = [&](long long x) {
            long long numBlock = x / 9;
            int rem = x - numBlock * 9;
            return numBlock * 45 + (rem + 1) * rem / 2;
        };

        cout << f(r) - f(l-1) << "\n";
    }
    return 0;
}

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 1 ms 252 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 1 ms 312 KB Output is correct
5 Correct 1 ms 208 KB Output is correct