#define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;

#include <atcoder/all>
using namespace atcoder;

#define REP(i, n) for(int i = 0; i < (int)n; i++)
#define LREP(i, n) for(LL i = 0; i < (LL)n; i++)
#define RREP(i, n) for(int i = (int)n-1; i >= 0; i--)
#define V(T) vector<T>

#define P pair<int, int>
#define LP pair<LL, LL>
#define T3 tuple<LL, LL, LL>
#define T4 tuple<LL, LL, LL, LL>
#define INF 1000000007
#define SIZE 500100
#define MOD 1000000007
typedef long long LL;

int N;
int A[SIZE];
int B[SIZE];

int main() {
	cin >> N;
	REP(i, N) cin >> A[i];

	REP(i, N + 1) B[i] = INF;
	
	B[0] = 0;
	REP(i, N) {
		if (A[i] < A[0]) continue;
		int j = lower_bound(B, B + (N + 1), A[i]) - B;
		B[j] = A[i];
	}

	int M = 0;
	REP(i, N + 1) if (B[i] != INF) M = i;

	cout << N - M << endl;
}