#include <iostream>
using namespace std;
void f(int (&a)[20]) {
for(int i = 0; i < 20; i++) {
cout << a[i] << endl;
}
}
int main() {
int a[20];
for(int i = 0; i < 20; i++) {
a[i] = i;
}
f(a);
return 0;
}
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