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- #include <iostream>
- #include <vector>
- using namespace std;
- //Pre: Llegeix seqüències de naturals
- //Post: Escriu si o no a cada una si té dos elements la suma dels quals es senar
- int main() {
- int n;
- while (cin >> n) {
- vector<int> v(n);
- for (int i = 0; i < n; ++i) {
- cin >> v[i];
- }
- bool senar = false;
- bool parell = false;
- int i = 0;
- while ((i < n) && (not senar or not parell)) {
- if (v[i]%2 == 0) parell = true;
- else if (v[i]%2 == 1) senar = true;
- ++i;
- }
- if (parell*senar == 1) cout << "si" << endl;
- else cout << "no" << endl;
- }
- }
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