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- #include <iostream>
- #include <algorithm>
- #include <cassert>
- using namespace std;
- int main ()
- {
- //freopen ("input", "r", stdin);
- //freopen ("output1", "w", stdout);
- int n;cin >> n;
- assert (1 <= n && n <= 1000000);
- long long sum = 0LL;
- for (int i = 1; i <= n; ++i)
- {
- int x;cin >> x;
- assert (1 <= x && x <= 1000000000);
- int cx = x, nr = 0;
- while (cx > 0)
- {
- nr = nr * 10 + cx % 10;
- cx /= 10;
- }
- if (x == nr) sum += 1LL * x;
- }
- cout << sum << '\n';
- return 0;
- }
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