Submission #1083931

#	Time	Username	Problem	Language	Result	Execution time	Memory
1083931		AliHasanli	Trol (COCI19_trol)	C++17	50 / 50	1 ms	348 KiB

trol

#include<bits/stdc++.h>
using namespace std;
long long sum(long long a,long long b)
{
    long long ans=0;
    for(long long i=a;i<=b;i++)
    {
        if(i%9==0)ans+=9;
        ans+=i%9;
    }
    return ans;
}
long long solve(long long a,long long b)
{
    if(b-a<=20)return sum(a,b);
    long long a2=a,b2=b,ans=0;
    if(a%9!=1)a2+=(10-a%9);
    if(b%9!=0)b2-=b%9;
    //cout<<a2<<" "<<b2<<endl;
    ans+=sum(a,a2-1);
    ans+=sum(b2+1,b);//cout<<ans<<endl;
    ans+=(b2-a2+1)/9*45;
    return ans;
}
int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        long long a,b;
        cin>>a>>b;
        cout<<solve(a,b)<<endl;
    }

    return 0;
}

• Subtask 1: 50 / 50