Submission #968760

#	Time	Username	Problem	Language	Result	Execution time	Memory
968760		vjudge1	Trol (COCI19_trol)	C++17	50 / 50	1 ms	348 KiB

trol

#include<bits/stdc++.h>
using namespace std;

long long f(long long x) {
    long long ret = (x / 9) * 45;
    for (int i = 1; i <= x % 9; i++) ret += i;
    return ret;
}

int main() {
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    int Q;
    cin >> Q;
    while (Q--) {
        long long l, r;
        cin >> l >> r;
        cout << f(r) - f(l - 1) << endl;
    }
    return 0;
}

• Subtask 1: 50 / 50