#include <cstdio>
#include <iostream>
using namespace std;
const int M = 200005;
int read()
{
	int x=0,f=1;char c;
	while((c=getchar())<'0' || c>'9') {if(c=='-') f=-1;}
	while(c>='0' && c<='9') {x=(x<<3)+(x<<1)+(c^48);c=getchar();}
	return x*f;
}
int n,f0,f1,dp,ls,a[M];
signed main()
{
	n=read();
	for(int i=1;i<=n;i++)
	{
		int v=read();
		if(v>=ls) f1=max(f1,f0+v-ls);
		else
		{
			f1=max(f0,f1-ls+v);
			f0+=v-ls;
			if(f0<0) dp++,f0=f1,f1=v;
		}
		f0=min(f0,v);f1=min(f1,v);ls=v;
	}
	printf("%d\n",dp+(ls>f0));
}