Submission #1259590

#	Time	Username	Problem	Language	Result	Execution time	Memory
1259590		mguuuh	Trol (COCI19_trol)	C++20	50 / 50	0 ms	328 KiB

trol

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

#define ll long long
vector<ll> deret = {0, 1, 3, 6, 10, 15, 21, 28, 36, 45};

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

int main(){
    ll q; cin >> q;
    for(ll i = 1; i <= q; i++){
        ll l, r; cin >> l >> r;
        cout << f(r) - f(l - 1) << endl;
    }
}

• Subtask 1: 50 / 50