1822. Sign of the Product of an Array leetcode

The problem you mentioned, "Sign of the Product of an Array" on LeetCode, involves finding the sign of the product of all the elements in an array. Here is a step-by-step explanation of how you can solve this problem:

1. Start by initializing a variable, let's call it "product," to 1. This variable will keep track of the product of all the elements in the array.

2. Iterate through each element in the array. For each element, multiply it with the current value of the "product" variable and update the "product" variable with the result.

3. After iterating through all the elements in the array, the "product" variable will contain the product of all the elements.

4. Next, check the sign of the "product" variable. If it is greater than 0, return 1, indicating a positive sign. If it is less than 0, return -1, indicating a negative sign. If it is equal to 0, return 0, indicating that the product is zero.

Here's an example implementation in C++:

int arraySign(vector<int>& nums) {
    int product = 1;
    for (int num : nums) {
        product *= num;
    }

    if (product > 0) {
        return 1;
    } else if (product < 0) {
        return -1;
    } else {
        return 0;
    }
}

This implementation calculates the product of all the numbers in the given array and returns the sign of that product. The time complexity of this solution is O(n), where n is the number of elements in the array.