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33 lines
697 B
C++
33 lines
697 B
C++
#include <bits/stdc++.h>
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using namespace std;
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int t, n;
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string s;
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int main() {
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cin >> t;
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while (t--) {
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cin >> n >> s;
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if (is_sorted(s.begin(), s.end())) {
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cout << 0 << endl;
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continue;
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}
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int cnt = count(s.begin(), s.end(), '1');
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s = ' ' + s;
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vector<int> ans;
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for (int i = 1; i <= n; i++) {
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if (i < n - cnt + 1 && s[i] == '1' || i >= n - cnt + 1 && s[i] == '0') {
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ans.push_back(i);
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}
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}
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cout << 1 << endl;
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cout << ans.size() << ' ';
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for (int i : ans) {
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cout << i << ' ';
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}
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cout << endl;
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}
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return 0;
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}
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