#include<bits/stdc++.h>
#define ll long long
using namespace std;
ll pow10[10]=
{
1,10,100,1000,10000,100000,
1000000,10000000,100000000,
1000000000
};
ll digit(ll x)
{
ll ans=0;
while(x!=0)
{
ans++;
x/=10;
}
return ans;
}
ll sum(ll x)
{
ll ans=0;
ll len=digit(x);
for(ll i=1;i<len;i++)
{
ans+=9*pow10[i-1]i;
}
ll rest=x-pow10[len-1]+1;
ans+=restlen;
return ans;
}
int main()
{
freopen("who.in", "r", stdin);
freopen("who.out", "w", stdout);
}
