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OI-codes/AcWing/896/896.cpp

29 lines
545 B
C++

#include <bits/stdc++.h>
using namespace std;
int n, a[100005], q[100005], len;
int main() {
cin >> n;
for (int i = 0; i < n; i++) {
cin >> a[i];
}
q[0] = 0xc0c0c0c0;
for (int i = 0; i < n; i++) {
int l = 0, r = len + 1;
while (l < r) {
int mid = l + r >> 1;
if (q[mid] < a[i]) {
l = mid + 1;
} else {
r = mid;
}
}
q[l] = a[i];
len = max(len, l);
}
cout << len << endl;
return 0;
}