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- #include <iostream>
- #include <vector>
- #include <set>
- #include <cmath>
- #include <algorithm>
- using namespace std;
- int main() {
- int n;
- cin >> n;
- set<int> s;
- vector<int> c;
- vector<int> vec(n);
- vector<int> x;
- vector<vector<int>> y;
- for (int i = 0; i < n; i++) {
- int m;
- cin >> m;
- vec.push_back(m);
- c.push_back(m);
- c.push_back(0);
- s.insert(m);
- y.push_back(c);
- c.clear();
- }
- copy(s.begin(), s.end(), back_inserter(x));
- for (int i = 0; i < n; i++) {
- for (int j = 0; j < n; j++){
- if (x[i] == c[j][0]) { c[j][1]++; }
- }
- }
- }
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