int* plusOne(int* digits, int digitsSize, int* returnSize){
    int temp = 0;
    int t = 1;
    int *ans = (int*)malloc(sizeof(int)*(digitsSize+1));
    for(int i=digitsSize-1;i>0;i--)
    {
        int tval = digits[i]+t+temp;
        if(tval >= 10)
        {
            temp = 1;
            ans[i+1] = tval%10;
            t=0;

        }
        else
        {
            temp = 0;
            ans[i+1] = tval;
            t=0;
        }
    }
    int tval = 0;
    if(digitsSize == 1)
    tval = digits[0]+t+temp;
     else
     tval = digits[0]+temp;

     if(tval >= 10)
     {
         ans[1] = tval%10;
         ans[0] = 1;
         *returnSize = digitsSize+1;
         return ans;
     }
     else{
         ans[1] = tval;
         ans++;
         *returnSize = digitsSize;
         return ans;
     }
     return NULL;
}