波波老师，这样写，错误在哪？leetcode上416题：
class Solution {
public:
bool canPartition(vector& nums) {
int size = nums.size();
int sum = 0;
for (int i = 0; i < size; i++)
{
sum += nums[i];
}
if (sum % 2 != 0)
{
return false;
}
int target = sum/2;

    vector<vector<bool>> dp(size,(vector<bool>(target + 1, false)));
    if (nums[0] <= target)
    {
        dp[0][nums[0]] = true;
    }
    
    if (size = 1)
    {
        return false;
    }
    for (int i = 1; i < size; i++)
    {
        for (int j = 0; j < target + 1; j++ )
        {
            dp[i][j] = dp[i - 1][j];
            if (nums[i] == j)
            {
                dp[i][j] = true;
                continue;
            }
            if (nums[i] < j)
            {
                dp[i][j] = (dp[i - 1][j- nums[i]] || dp[i - 1][j]);
            }
        }
    }
    return dp[size - 1][target];
}

};