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Submission #735905

# Submission time Handle Problem Language Result Execution time Memory
735905 2023-05-05T02:01:23 Z Dulguun88 Trol (COCI19_trol) C++14
50 / 50
 1 ms 212 KB 
#include <bits/stdc++.h>
using namespace std;
int q;
long long  l, r; 
long long  sum1(int a, int b) {
    return (a + b) * (b - a + 1) / 2;
}
long long sum(long long x) {
    long long  t = x / 9;
    x %= 9;
    return sum1(1, 9) * t + sum1(1, x);
}
int main() {
cin >> q;
    while (q--) {
        cin >> l >> r;
        cout << sum(r) - sum(l - 1) << '\n';
    }   
}

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct