Submission #485658

#	Time	Username	Problem	Language	Result	Execution time	Memory
485658		tato	Trol (COCI19_trol)	C++14	20 / 50	1090 ms	268 KiB

trol

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

ll back(ll a)
{
	ll cnt=0;
	while(a>0)
		{
			cnt+=(a%10);
			a=a/10;
		}
		if(cnt>9)
			return back(cnt);
		else
		return cnt;
	
}

int main()
{
	int t;
	cin>>t;
	
	while(t--)
	{
		ll l,r;
		cin>>l>>r;
		ll cnt=0;
		for(int k=l; k<=r; k++)
			cnt+=back(k);
			
		cout<<cnt<<endl;
		
	}
	
	return 0;
}

• Subtask 1: 20 / 50