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17 lines
347 B
17 lines
347 B
2 years ago
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#include <bits/stdc++.h>
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using namespace std;
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const int N = 110;
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int a[N], al;
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int main() {
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int n;
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cin >> n;
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for (int i = 1; i <= n; i++) cin >> a[i];
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sort(a + 1, a + 1 + n);
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al = unique(a + 1, a + 1 + n) - a - 1;
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cout << al << endl;
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for (int i = 1; i <= al; i++) cout << a[i] << " ";
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return 0;
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}
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