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C - LIS or Reverse LIS?

https://codeforces.com/contest/1682/submission/158040482
This commit is contained in:
Baoshuo Ren 2022-05-22 23:20:13 +08:00
parent b7f96f7879
commit d713607fae
Signed by: baoshuo
GPG Key ID: 70F90A673FB1AB68

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Codeforces/1682/C/C.cpp Normal file
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#include <algorithm>
#include <cmath>
#include <iostream>
using std::cin;
using std::cout;
const char endl = '\n';
const int N = 2e5 + 5;
int t, n, a[N];
int main() {
std::ios::sync_with_stdio(false);
cin >> t;
while (t--) {
int ans = 2;
cin >> n;
for (int i = 1; i <= n; i++) {
cin >> a[i];
}
if (n <= 2) {
cout << 1 << endl;
continue;
}
std::sort(a + 1, a + 1 + n);
for (int i = 3; i <= n; i++) {
if (a[i] != a[i - 2]) ans++;
}
cout << (ans + 1) / 2 << endl;
}
return 0;
}