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#include<iostream>
using namespace std;
#include <algorithm>
int main() {
int length;
cin >> length;
int a[30];
int count = 0;
for (int i = 0; i < length; i++) {
cin >> a[i];
count++;
}
sort(a, a + count);
for (int i = 0; i < count; i++) {
if(a[i]!=a[i-1])
for (int j = 0; j < count; j++) {// 1 2 2 3
if (i!=j&&a[j]!=a[j-1])
cout << "(" << a[i] << "," << a[j] << ")" << endl;
...
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