28 lines
555 B
C++
28 lines
555 B
C++
//
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// Created by darian on 07.06.24.
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//
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#include <bits/stdc++.h>
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using namespace std;
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using ll = long long;
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int main() {
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int n; cin >> n;
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vector<ll> in(n);
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for (auto &e : in) cin >> e;
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int lo = 0;
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int hi = 0;
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int max_count = 1;
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set<ll> current = {in[0]};
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while (hi < n - 1) {
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hi++;
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while (current.count(in[hi])) {
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current.erase(in[lo]);
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lo++;
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}
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current.insert(in[hi]);
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max_count = max(max_count, (int)current.size());
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}
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cout << max_count << endl;
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} |