#include<bits/stdc++.h>
using namespace std;
using ui=unsigned int;
using ll=long long;
using ull=unsigned long long;
using i128=__int128_t;
using u128=__uint128_t;
using ld=long double;
void solve()
{
int n;
cin >> n;
string s;
cin >> s;
if(s.back()=='0')
{
cout << -1;
return;
}
else
{
vector<int>p(n,0),loc;
for(int i=0;i<s.size();i++)
{
if(s[i]=='1') loc.push_back(i+1);
}
for(int i=0,j=0;i<n;)
{
while(s[i]!='1')
{
p[i]=loc[j];
i++;
loc[j]--;
}
p[i]=loc[j];
i++;
j++;
}
for(int i=0;i<n;i++) cout << p[i] << " ";
}
}
int main()
{
ios::sync_with_stdio(false);
cin.tie(nullptr);
int t=1;
//cin >> t;
while(t--)
{
solve();
}
return 0;
}