23 lines
463 B
C++
23 lines
463 B
C++
#include <bits/stdc++.h>
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using namespace std;
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int main() {
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int N;
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int x;
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set<int> set1;
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cin >> N;
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//输入
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for (int i = 0; i < N; i++) {
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cin >> x;
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set1.insert(x);
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}
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//输出个数
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cout << set1.size() << endl;
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//迭代器.输出每一个数值
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set<int>::iterator it;
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for (it = set1.begin(); it != set1.end(); it++)
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cout << *it << " ";
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cout << endl;
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return 0;
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} |