class Solution {
public:
    vector<int> productExceptSelf(vector<int>& nums) {
        int n = nums.size();
        vector<int> ans(n);

        ans[0] = 1;
        for (int i = 1; i < n; i++)
        {
            ans[i] = ans[i-1] * nums[i-1];
        }

        int suffix = 1;
        for (int i = n-1; i >= 0; i--) 
        {
            ans[i] *= suffix;
            suffix *= nums[i];
        }

        return ans;
    }
};
