#include <iostream>
#include <algorithm>
#include <vector>
#include <map>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <queue>
#include <deque>
#include <stack>
#include <cmath>
#include <math.h>
#include <array>
#include <random>
#include <bitset>
#include <climits>
#include <cstring>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
#define endl '\n'
#define mod 1000000007
#define INF 0x3f3f3f3f
#pragma GCC optimize("O3,Ofast,unroll-loops")
#pragma GCC target("avx2,sse3,sse4,avx")
#pragma GCC target("popcnt")
template <class x>
using ordered_set = tree<x, null_type, less<x>, rb_tree_tag, tree_order_statistics_node_update>;
typedef pair<int, int> ipair;
static inline int read()
{
int x = 0;char ch = getchar();
while (ch < '0' || ch>'9') ch = getchar();
while (ch >= '0' && ch <= '9') x = (x << 3) + (x << 1) + (ch ^ 48), ch = getchar();
return x;
}
static inline void print(const int &x) {
if (x > 9)print(x / 10);
putchar('0' + x % 10);
}
int main()
{
cin.tie(0) -> sync_with_stdio(0);
int n, x;
cin >> n >> x;
int list[n];
for(int i = 0;i < n;cin >> list[i++]);
vector<int> taken;
taken.push_back(list[0]);
for(int i = 1;i < n;i++)
{
if(taken.back() >= list[i])
{
auto it = lower_bound(taken.begin(), taken.end(), list[i]) - taken.begin();
taken[it] = list[i];
}
else
{
taken.push_back(list[i]);
}
}
cout << taken.size();
}
