Submission #1174747

#	Time	Username	Problem	Language	Result	Execution time	Memory
1174747		sofwant	Trol (COCI19_trol)	C++20	0 / 50	0 ms	328 KiB

trol

// author: sofwant || a6cenna
// created at 27/03/2025
// suffering leaves suffering leaves.

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

#define suffering_leaves_suffering_leaves ios::sync_with_stdio(false); cin.tie(nullptr);
#define ll long long
#define pll pair<ll, ll>
#define pii pair<int, int>
#define fs first
#define sc second
#define pb push_back

void solve() {
    ll l,r;cin>>l>>r;
    // pake deret aritmatika
    ll a=l%9;
    int n=r-l+1;
    int ans=n/9*45;
    if(n%9!=0) {
        ans+=((n%9)*(a+(r%9)))/2;
    }

    cout << ans;
}

int main() {
    suffering_leaves_suffering_leaves

    int t;
    cin >> t;

    while(t--) {
        solve();
    }
}

• Subtask 1: 0 / 50