#include
#include
#include
#include
#include
#pragma GCC optimize("Ofast")
using ll = long long;
using ld = long double;
using namespace std;
ll a[13];
void solve(){
ll sum = 0;
for(auto i: a)
sum += i;
cout << sum;</strong>
}
signed main() {
for(ll i = 0; i < 13; i++)
cin >> a[i];
solve();
}