n = int(input())
s = input()
mx = n
ans = 10**n
for i in range(0,n-1):
if s[i+1]!='0':
mx = min(mx,max(i+1,n-(i+1)))
for i in range(0,n-1):
if(s[i+1]!='0' and max(i+1,n-(i+1))==mx):
ans = min(ans,int(s[0:i+1])+int(s[i+1:n]))
print(ans)
#include <bits/stdc++.h>
using namespace std;
string stringgen(string a,string b)
{
string res="";
int carry=0,sum=0;
string s="";
if(a.length()<b.length())
{
for(int i=0;i<b.length()-a.length();i++)
s+='0';
a=s+a;
}
else if(a.length()>b.length())
{
for(int i=0;i<a.length()-b.length();i++)
s+='0';
b=s+b;
}
for(int i=a.length()-1;i>=0;i--)
{
int sum=(a[i]-'0'+b[i]-'0')+carry;
carry=sum/10;
res+=to_string(sum%10);
}
if(carry!=0)
res+=to_string(carry);
reverse(res.begin(),res.end());
return res;
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int l,x,y;
cin>>l;
string s;
cin>>s;
string a,b;
if(l%2==0)
{
x=l/2-1;
y=l/2;
}
else
{
x=l/2-1;
y=l/2+1;
}
for(int i=x;i>=0;i--)
{
if(s[i]!='0')
{
if(i-1>=0)
{
//cout<<s.substr(0,i)<<" "<<s.substr(i,l-i)<<endl;
a=stringgen(s.substr(0,i),s.substr(i,l-i));
break;
}
else
{
a=stringgen("",s.substr(i,l-i));
break;
}
}
}
for(int i=y;i<l;i++)
{
if(s[i]!='0')
{
if(i-1>=0)
{
b=stringgen(s.substr(0,i),s.substr(i,l-i));
break;
}
else
{
b=stringgen("",s.substr(i,l-i));
break;
}
}
}
if(b.length()==0)
b=a;
if(l%2==0)
{
if(a.length()==b.length())
cout<<min(a,b)<<endl;
else if(a.length()<b.length())
cout<<a<<endl;
else
cout<<b<<endl;
}
else
{
if(s[l/2]=='0')
{
if(a.length()==b.length())
cout<<min(a,b)<<endl;
else if(a.length()<b.length())
cout<<a<<endl;
else
cout<<b<<endl;
}
else
{
a=stringgen(s.substr(0,l/2 +1),s.substr(l/2+1,l/2));
b=stringgen(s.substr(0,l/2),s.substr(l/2,l/2 +1));
//cout<<b<<endl;
if(a.length()==b.length())
cout<<min(a,b)<<endl;
else if(a.length()<b.length())
cout<<a<<endl;
else
cout<<b<<endl;
}
}
}1508B - Almost Sorted | 1690C - Restoring the Duration of Tasks |
1055A - Metro | 1036D - Vasya and Arrays |
1139C - Edgy Trees | 37A - Towers |
353A - Domino | 409H - A + B Strikes Back |
1262A - Math Problem | 158C - Cd and pwd commands |
194A - Exams | 1673B - A Perfectly Balanced String |
1104B - Game with string | 1169B - Pairs |
1567D - Expression Evaluation Error | 78A - Haiku |
1287A - Angry Students | 1428A - Box is Pull |
234B - Reading | 581B - Luxurious Houses |
1481C - Fence Painting | 935A - Fafa and his Company |
22A - Second Order Statistics | 1720B - Interesting Sum |
1720A - Burenka Plays with Fractions | 3A - Shortest path of the king |
1720C - Corners | 574A - Bear and Elections |
352B - Jeff and Periods | 1244A - Pens and Pencils |