Submission #344811

#	Time	Username	Problem	Language	Result	Execution time	Memory
344811		Pichon5	Trol (COCI19_trol)	C++17	50 / 50	1 ms	364 KiB

trol

#include<bits/stdc++.h>
#define lcm(a,b) (a/__gcd(a,b))*b
#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define ll long long int
#define vi vector<int>
#define vll vector<ll>
#define pb push_back
#define F first
#define S second
#define mp make_pair
//salida rapida "\n"
//DECIMALES fixed<<sp(n)<<x<<endl;
//gcd(a,b)= ax + by
//lCB x&-x
//set.erase(it) - ersases the element present at the required index//auto it = s.find(element)
//set.find(element) - iterator pointing to the given element if it is present else return pointer pointing to set.end()
//set.lower_bound(element) - iterator pointing to element greater than or equal to the given element
//set.upper_bound(element) - iterator pointing to element greater than the given element
// | ^
using namespace std;
ll f(ll num){
    while(num>9){
        ll aux=num;
        ll sum=0;
        while(aux>0){
            sum+=aux%10;
            aux/=10;
        }
        num=sum;
    }
    return num;
}
int main()
{
    ll q,l,r;
    cin>>q;
    while(q--){
        cin>>l>>r;
        ll c=r-l+1;
        //c es la cantida de numeros que tengo que sumar
        ll in=f(l);
        if(in+c-1<10){
            cout<<(in+in+c-1)*(c)/2<<endl;
            continue;
        }
        ll res=(in+9)*(9-in+1)/2;
        c-=(9-in+1);
        res+=(c/9)*45;
        c=c%9;
        res+=(1+c)*c/2;
        cout<<res<<endl;

    }

    return 0;
}

• Subtask 1: 50 / 50