#include <iostream>
using namespace std;
// Sum of N numbers in C++
int sum(int n) {
if(n == 0) {
return n;
}
return n + sum(n-1);
}
int main() {
cout << sum(5);
return 0;
}
class Solution { public int [] countOppositeParity ( int [] nums ) { // approach 1 - checks every pair int n = n...
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