This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <iostream>
using namespace std;
int n, d;
int nums[300010];
int dp[300010];
int maxim[300000];
int maxi;
int main(){
	cin >> n >> d;
	for (int i = 0; i < n; ++i){
		cin >> nums[i];
		dp[i] = 1;
		maxim[i] = 0;
	}
	maxim[1] = nums[n-1];
	for (int i = n-2; i >= 0; --i){
		if (nums[i] < nums[i+1]){
			dp[i] = dp[i+1]+1;
			while (nums[i] < maxim[dp[i]]){
				dp[i]++;
			}
			maxim[dp[i]] = max(maxim[dp[i]], nums[i]);
		}
		if (nums[i] == nums[i-1]){
			dp[i] = dp[i-1];
		}
		if (nums[i] > nums[i+1]){
			while(nums[i] < maxim[dp[i]]){
				dp[i]++;
			}
			maxim[dp[i]] = max(maxim[dp[i]], nums[i]);
		}
	}
	for (int i = 0; i < n; ++i){
		maxi = max(maxi, dp[i]);
	}
	
	cout << maxi;
	
}
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