Given an array & a value x, find if the array contains any 2 values whoes sum = x

Question

C++ answer · Accepted Answer

#include 
#include 

using namespace std;

bool findIfSum(const vector &x, const int val)
{
    vectory = x;
    sort(begin(y), end(y));

    for (auto i = y.begin(); i != y.end(); ++i)
    {
        int diff = val - *i;
        if (diff < 0) return false;
        if (binary_search (i, y.end(), diff)) return true;
    }
    return false;
}

Nick · Answer

def has_sum( l, v ):
    # assuming more than 2 elements
    for i in range( len(l) ):
        _v = v - l[i]
        _l = l[0:i] + l[i+1:]
        if _v in _l :
            return True
    return False

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