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21 lines
392 B
21 lines
392 B
#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];
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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 = 0; i < n; i++) cin >> a[i];
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//排序，从小到大
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sort(a, a + n);
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//去重
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int cnt = unique(a, a + n) - a;
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//剩余个数
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cout << cnt << endl;
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for (int i = 0; i < cnt; i++) cout << a[i] << " ";
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return 0;
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} |