This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
bool palindrome (string & s) {
int l = 0, r = (int)s.size() - 1;
while (l <= r) {
if (s[l] != s[r]) return false;
l++; r--;
}
return true;
}
int main() {
ios::sync_with_stdio(false);
cin.tie(NULL); cout.tie(NULL);
ll n, x, sum = 0;
vector<ll> vi;
vector<string> vs;
cin >> n;
for (int i = 0; i < n; i++) {
cin >> x;
vi.push_back(x);
vs.push_back(to_string(x));
}
for (int i = 0; i < n; i++) {
if (palindrome(vs[i])) sum += vi[i];
}
cout << sum << '\n';
return 0;
}
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