#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#define ll long long
#define str string
#define pb push_back
#define pf push_front
#define in insert
#define all(v) v.begin(),v.end()
const int sz=1000000,INF=1000000000;
using namespace std;
bool isPal(ll num)
{
str numC1=to_string(num),numC2=numC1;
reverse(all(numC1));
if(numC1==numC2)
{
return true;
}
else
{
return false;
}
}
void solve()
{
ll n,num,ans=0;
cin>>n;
for(int i=0;i<n;i++)
{
cin>>num;
if(isPal(num))
{
ans+=num;
}
}
cout<<ans;
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(nullptr),cout.tie(nullptr);
ll t=1;
//cin>>t;
while(t--)
{
solve();
}
}
