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23 lines
413 B
C++
23 lines
413 B
C++
#include <bits/stdc++.h>
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using namespace std;
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int main() {
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int t;
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scanf("%d", &t);
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while (t--) {
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int n, x;
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unordered_map<int, bool> m;
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scanf("%d", &n);
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for (int i = 0; i < n; i++) {
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scanf("%d", &x);
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if (!m[x]) {
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m[x] = true;
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printf("%d ", x);
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}
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}
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printf("\n");
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}
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return 0;
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}
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