为什么会在洛谷上编译错误？

#include<iostream>
#include<stdio.h>
#include<string.h>
using namespace std;
int real[200000000] = { 1,1 };
int main()
{
    int n;
    cin >> n;
    int len = 1;
    while ((n--) > 0 && len <= 500)
    {
        int i = 1;
        int z = 0;
        for (; i <= len; i++)
        {
            real[i] *= 2;
            real[i] += z;
            z = 0;
            while (real[i] >= 10)
            {
                z= real[i] / 10;
                real[i] %= 10;
                if (i==len&&z!=0)
                    len++;

            }
        }
    }
    real[1] -= 1;
    int t = 0;
    for (int i = 500; i > 0; i--)
    {
        cout << real[i];
        t++;
        if (t == 50)
        {
            cout << endl;
            t = 0;
        }
    }
    return 0;
} ```