#include<bits/stdc++.h>
using namespace std;
int n,a[105],dp[105],m; 
int main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>a[i];
	}
	for(int i=2;i<=n;i++){
		dp[i]=max(a[i]+a[i-1],a[i]);
	}
	for(int i=1;i<=n;i++){
		m=max(m,dp[i]);
		cout<<m;
	}


	return 0;
}

/**************************************************************
	Problem: 1589
	User: caijiajie
	Language: C++
	Result: Wrong Answer
****************************************************************/