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- #include <iostream>
- using namespace std;
- int main() {
- int n;
- int i = 1;
- int cont = 0;
- int primero = 0;
- while (cin >> n) {
- if (i == 1) primero = n;
- if (i % 2 != 0) if (primero == n) ++cont;
- ++i;
- }
- cout << cont << endl;
- }
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