29 lines
482 B
C++
29 lines
482 B
C++
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#include <algorithm>
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#include <bits/stdc++.h>
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#include <climits>
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#include <cstring>
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#include <iostream>
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using namespace std;
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int T;
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int main() {
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cin >> T;
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for (int i = 1; i <= T; i++) {
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int n;
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cin>>n;
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int zeroCount = 0;
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for (int j=1; j<=n; j++) {
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int input;
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cin>>input;
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if (input==0) {
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zeroCount++;
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}
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}
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cout<<n-zeroCount<<endl;
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for (int j=1; j<=n; j++) {
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cout<<1<<" ";
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}
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cout<<endl;
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}
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}
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