Submission #976087

#	Time	Username	Problem	Language	Result	Execution time	Memory
976087		vjudge1	Trol (COCI19_trol)	C++17	50 / 50	1 ms	348 KiB

trol

#include <bits/stdc++.h>
using namespace std;
#define ios ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ll long long

// 1-9=45
// 1-18=90

ll l,r;
ll solve(ll n){
    ll count,x,idx,sum=0;
    idx=n%9+1;
    while(idx--)sum+=idx;
    
    count=n/9;
    x= 45*count+sum;
    return x;   
}

int main(){
    ios
    ll t; cin >> t;
    while (t--){
        cin >> l >> r;
        cout << solve(r)-solve(l-1) << endl;
    }


    return 0;
}

• Subtask 1: 50 / 50