What will be the output of the following C++ code?

#include <iostream>
#include <functional>
#include <algorithm>
using namespace std;
int main ()
{
    int numbers[] = {10, -20, -30, 40, -50};
    int cx;
    cx = count_if ( numbers, numbers + 5, bind2nd(less<int>(), 0) );
    cout << cx;
    return 0;
}