Go: package main

import (
	"bufio"
	"os"
	"strconv"
	"fmt"
)

var scanner = bufio.NewScanner(os.Stdin)

func nextInt() int {
	scanner.Scan()
	i, e := strconv.Atoi(scanner.Text())
	if e != nil {
		panic(e)
	}
	return i
}

func max(x, y int) int {
	if x > y {
		return x
	} else {
		return y
	}
}

func main() {
	sum := make([]int, 5001)
	for {
		n := nextInt()
		if n == 0 {
			break
		}
		for i := 0; i < n; i++ {
			a := nextInt()
			sum[i+1] = sum[i]+a
		}
		ret := sum[1]
		for i := 0; i <= n; i++ {
			for j := i + 1; j <= n; j++ {
				ret = max(ret, sum[j]-sum[i])
			}
		}
		fmt.Println(ret)
	}
}

C++: #include<iostream>
#include<algorithm>
using namespace std;
int n, a[500000], maxn, sum;
int main() {
	while (true) {
		cin >> n; maxn = -1000000000;
		if (n == 0) { break; }
		for (int i = 0; i < n; i++) {
			cin >> a[i];
		}
		for (int i = 0; i < n; i++) {
			sum = 0;
			for (int j = i; j < n; j++) {
				sum += a[j];
				maxn = max(sum, maxn);
			}
		}
		cout << maxn << endl;
	}
}

C++: #include <iostream>
using namespace std;
int n,a[5000];
int main(){
	int i,j,t,tmp;
	while(cin >> n && n){
		tmp = 0;
		t = -1000000;
		for(i=0;i<n;i++){
			cin >> a[i];
		}
		for(i=0;i<n;i++){
			tmp += a[i];
			if(t < tmp) t = tmp;
				for(j=i+1;j<n;j++){
					tmp += a[j];
					if(t < tmp) t = tmp;
				}
			tmp = 0;
		}
		cout << t << endl;
	}
	return 0;
}

C++: //include----------------------------------------------------------------------------------------------------------------------
#include <bits/stdc++.h>

//using namespace--------------------------------------------------------------------------------------------------------------
using namespace std;

//define-----------------------------------------------------------------------------------------------------------------------
#define rep(i, n) for(int i = 0; i < (int)n; i++)
#define FOR(i, s, n) for(int i = s; i < (int)n; i++)
#define per(i, n) for(int i = n; i >= 0; i--)
#define ROF(i, s, n) for(int i = s; i >= (int)n; i--)
#define FORIT(i, A) for (auto i : A)
#define PRINT(x) cout << (x) << "\n"
#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define EACH(i, n) for (__typeof((n).begin()) i = (n).begin(); i != (n).end(); ++i)
#define SZ(a) int((a).size())
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())
#define INF 1 << 25
#define CLR(a) memset((a), 0 ,sizeof(a))
#define dump(x) cerr << #x << " = " << (x) << "\n";
#define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << "\n";
#define sq(n) (n) * (n)

//typedef----------------------------------------------------------------------------------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;
typedef unsigned int uint;
typedef unsigned long long ull;

//const------------------------------------------------------------------------------------------------------------------------
const double EPS = 1e-10;
const double PI = acos( -1.0 );

//global-----------------------------------------------------------------------------------------------------------------------
int n;
VI ar;
LL ans = 0;
//function---------------------------------------------------------------------------------------------------------------------
void solve( int now_check, LL sum ) {
	if ( ans < sum ) {
		ans = sum;
	}
	if ( now_check == n ) {
		return;
	}
	if ( sum <= 0 ) {
		return;
	}
	if ( ar[ now_check ] < 0 ) {
		solve( now_check + 1, 0 );
	}
	solve( now_check + 1, sum + ar[ now_check ] );
}

int main() {
	while ( scanf( "%d", &n ) ) {
		if ( !n ) {
			return 0;
		}
		ans = 0;
		ar.resize( n );
		rep( i, n ) {
			scanf( "%d", &ar[ i ] );
		}
		solve( 0, 0 );
		printf( "%lld\n", ans );
	}
	return 0;
}

C++: #include <iostream>
using namespace std;
int main (){
while (1){
long n,dset[5000],max=-99999,temp=0;
cin>>n;
if (n==0)break;
for (int i=0;i<n;i++){
        cin>>dset[i];
}
for (int i=0;i<n;i++){
        for (int j=i;j<n;j++){
                temp=temp+dset[j];
                if (max<temp){
                        max=temp;
                }
        }
temp=0;
}
cout<<max<<endl;
}
return 0;
}

C++: #include <iostream>

using namespace std;

int main() {

	int n;
	int a[5000];

	while(cin >> n) {
		if(n==0)
			break;
		int max=0;
		for(int i=0; i<n; i++) {
			cin >> a[i];
		}
		for(int i=0; i<n; i++) {
			int t=0;
			for(int j=i; j<n; j++) {
				t+=a[j];
				if(t>max)
					max=t;
			}
		}
		cout << max << endl;
	}

	return 0;

}

C++: #include<iostream>
#include<vector>
int main()
{
	while (!std::cin.eof())
	{
		int n;
		std::cin >> n;
		if (n == 0)
		{
			break;
		}
		std::vector<int>a;
		int max = -100001;
		bool is_all_minus = true;
		for (int i = 0; i < n; i++)
		{
			int foo;
			std::cin >> foo;
			if (foo < 0 && max < foo)
			{
				max = foo;
			}
			is_all_minus &= foo < 0;
			if (i == 0 || a.back() * foo < 0 || a.back() < 0 && foo == 0 || a.back() == 0 && foo < 0)
			{
				a.push_back(foo);
			}
			else
			{
				a.back() += foo;
			}
		}
		if (!is_all_minus)
		{
			if (a.size() == 1)
			{
				max = a[0];
			}
			else
			{
				int begin = a[0] >= 0 ? 0 : 1;
				int temp_max = a[begin];
				try
				{
					for (int i = begin;;)
					{
						if (a.at(i + 1) + a.at(i + 2) > 0)
						{
							temp_max += a[i + 1] + a[i + 2];
							i += 2;
						}
						else
						{
							if (max < temp_max)
							{
								max = temp_max;
							}
							temp_max = a[i + 2];
							i += 2;
						}
					}
				}
				catch (std::out_of_range) {}
				if (max < temp_max)
				{
					max = temp_max;
				}
			}
		}
		std::cout << max << std::endl;
	}
	return 0;
}

C++: #include <iostream>
using namespace std;

int main()
{
	int n=1, count = 0;
	int a[10000];
	while (cin >> n) {
		for (int i = 0; i < n; i++) {
			cin >> a[i];
		}
		int sum = 0, max = -100000;
		for (int ai = 0; ai < n; ai++) {
			sum = 0;
			for (int bi = ai; bi < n; bi++) {
				sum = sum + a[bi];
				if (sum > max) {
					max = sum;
				}
			}
		}
		if (n == 0)
			break;
		cout << max << endl;
	}
}

C++: #include <iostream>
#include <cstdio>
using namespace std;
int main(int argc, const char * argv[])
{
    while (1) {
        int n; scanf("%d", &n);
        if (n == 0) break;
        long int a[n], b[n], tmp = 0;
        for (int i = 0; i < n; i++) {
            scanf("%ld", &a[i]);
            b[i] = 0;
        }
        for (int i = 0; i < n; i++) {
            for (int k = 0; k <= i; k++) {
                b[i] += a[k];
            }
        }
        for (int i = n-1; i > 0; i--) {
            for (int k = i-1; k >= 0; k--) {
                if (i == n-1) {
                    tmp = (b[i] - b[k] + a[k]);
                }
                if (tmp < (b[i] - b[k] + a[k])) {
                    tmp = (b[i] - b[k] + a[k]);
                }
            }
        }
        cout << tmp << endl;
    }
    return 0;
}

C++: #include <iostream>
using namespace std;
int main (){
while (1){
long n,dset[5000],temp=0,max;
cin>>n;
if (n==0)break;
for (int i=0;i<n;i++){
        cin>>dset[i];
}
max=-1000000;
for (int i=0;i<n;i++){
        for (int j=i;j<n;j++){
                temp=temp+dset[j];
                if (max<temp){
                        max=temp;
                }
        }
temp=0;
}
cout<<max<<endl;
}
return 0;
}