29 lines
555 B
C++
29 lines
555 B
C++
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#include <bits/stdc++.h>
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using namespace std;
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int n, m, num = 0, ans = 0;
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//利用数组桶排
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bool path[1001] = {0};
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queue<int> Q;
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int main() {
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cin >> m >> n;
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for (int i = 1; i <= n; i++) {
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int x;
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cin >> x;
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if (!path[x]) {
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num++;
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ans++;
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Q.push(x);
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path[x] = 1;
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if (num > m) {
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path[Q.front()] = 0;
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Q.pop();
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num--;
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}
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}
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}
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cout << ans << endl;
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return 0;
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}
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