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29 lines
600 B
C++
29 lines
600 B
C++
#include <iostream>
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#include <map>
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using namespace std;
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int n, sum, tmp;
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multimap<int, int> M;
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int main()
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{
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cin >> n;
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for (int i = 0; i < n; i++)
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{
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cin >> tmp;
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sum += tmp;
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M.insert(make_pair(tmp, i + 1));
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}
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n >>= 1;
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sum /= n;
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multimap<int, int>::iterator ite;
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for (int i = 0; i < n; i++)
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{
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ite = M.begin();
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tmp = sum - ite->first;
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cout << ite->second << " ";
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M.erase(ite);
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ite = M.find(tmp);
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cout << ite->second << endl;
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M.erase(ite);
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}
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return 0;
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} |