求大佬帮忙加个速，最后一个点1372ms

#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
const int MAX_N=100050;

int main(){
	register int h[MAX_N],n;
	cin>>n;
	for(register int i=0;i<n;i++)cin>>h[i];//scanf("%d",&h[i]);
	int ans=0;
	for(register int i=0;i<n;i++){
		while(h[i]!=0){
			register int j=i;
			while(h[j]!=0&&j<n)j++;
			for(register int m=i;m<j;m++)h[m]--;
			if(j!=i)ans++;
		}
	}
	cout<<ans;
	return 0;
}