Submission #456155

#	Time	Username	Problem	Language	Result	Execution time	Memory
456155		Jasiekstrz	Trol (COCI19_trol)	C++17	50 / 50	1 ms	316 KiB

trol

#include<bits/stdc++.h>
#define fi first
#define se second
using namespace std;
long long f(long long x)
{
	long long d=x/9,r=x%9;
	return d*45+r*(r+1)/2;
}
void solve()
{
	long long l,r;
	cin>>l>>r;
	cout<<f(r)-f(l-1)<<"\n";
	return;
}
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	int qq;
	cin>>qq;
	while(qq--)
		solve();
	return 0;
}

• Subtask 1: 50 / 50