Go: package main

import "fmt"

func main() {
	var result []int
	for {
		var n, a, maxSum int
		fmt.Scan(&n)

		if n == 0 {
			break
		}

		maxSum = 0
		sum := 0
		for i := 0; i < n; i++ {
			fmt.Scan(&a)
			if i == 0 {
				sum = a
				maxSum = sum
			} else if sum+a < a {
				sum = a
				if maxSum < sum {
					maxSum = sum
				}
			} else {
				sum = sum + a
				if maxSum < sum {
					maxSum = sum
				}
			}
		}

		result = append(result, maxSum)
	}

	for _, v := range result {
		fmt.Println(v)
	}
}

C++: #include <iostream>

#define SIZE 5001

using namespace std;

int main() {
	int n;
	while (cin >> n) {
		if (n == 0) {
			break;
		}

		int list[SIZE], max = -114514;
		list[0] = 0;
		for (int i = 0; i < n; i++) {
			cin >> list[i + 1];

			if (list[i + 1] > max) {
				max = list[i + 1];
			}
			list[i + 1] += list[i];
		}

		for (int i = 2; i < n; i++) {
			for (int j = i; j < n; j++) {
				if (list[j] - list[j - i] > max) {
					max = list[j] - list[j - i];
				}
			}
		}

		if (list[n] > max) {
			max = list[n];
		}
		cout << max << endl;
	}
	return 0;
}

C++: #include<stdio.h>

int main(void) 
{
    int num[5000];
	int cut_i,max;
	int kousuu;
	int nyuryoku;

	while(1){
		scanf("%d",&kousuu);
		
		if(kousuu == 0){
			break;
		}

		int kou = 0;
		
		for(cut_i=0;cut_i<kousuu;cut_i++){
			num[cut_i]=0;
		}

		for(cut_i=0;cut_i<kousuu;cut_i++){
			scanf("%d",&nyuryoku);

			if(num[kou] * nyuryoku <0){
				kou++;
			}
			num[kou]+=nyuryoku;

			if(max<num[kou]){
				max = num[kou];
			}
		}

		kou++;
		cut_i = 0;
		
		for(cut_i=0;cut_i<kou;cut_i++){

			if(max<num[cut_i]){
				max = num[cut_i];
			}
			
			if(num[cut_i]+num[cut_i+1] > 0){
				num[cut_i+1]+=num[cut_i];
			}
		}

		printf("%d\n",max);

	}
    return 0;
}

C++: #include <cstdio>
#include <algorithm>
using namespace std;

int main(){
	const int MAX_n = 5000;
	int n, a[MAX_n + 1], z, beg, res;
	
	while(true){
		scanf("%d", &n);
		
		if(n == 0) return 0;
		
		a[0] = 0;
		for(int i = 1; i <= n; i++){
			scanf("%d", &z);
			a[i] = z + a[i - 1];
		}
		
		beg = 0;
		res = 0;
		for(int i = 1; i <= n; i++){
			beg = min(beg, a[i - 1]);
			res = max(res, a[i] - beg);
		}
		
		printf("%d\n", res);
	}
}

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

int main() {
	int a[5000];
	int n;
	int sum = 0;
	int m = 0;
	while(1){
		scanf("%d", &n);
		m = 0;
		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];
				m = max(sum, m);
			}
		}
		cout << m << endl;
	}
	return 0;
}

C++: #include <iostream>
#include <stack>
#include <string>
#include <vector>
#include <queue>
#include <algorithm>
#include <stdlib.h>
#include <math.h>
#include <stdio.h>

int max(int a,int b){
	if(a>=b)return a;
	else return b;
}

int min(int a,int b){
	if(a>=b)return b;
	else return a;
}

void swap(int *a,int *b){
	int tmp = *a;
	*a = *b;
	*b = tmp;
}

void babbleSort(int *data,int n){
	for(int i=0;i<n;i++){
		for(int j=n-1;j>i;j--){
			if(data[j]>=data[j-1]){
				swap(&data[j],&data[j-1]);
			}
		}
	}
}


using namespace std;

/*
cin.ignore();
	getline(cin,dataStr);
	data = new int[n];
	stringToInteger(&dataStr,data,n);
*/

void stringToInteger(string *str,int *data,int n){
	for(int i=1;i<=n;i++){
		int spaceN = str->find(' ',0);

		data[i] = atoi(str->substr(0,spaceN).c_str());
		str->erase(0,spaceN+1);
	}
}

int main(){

	int n;
	int *a;

	int ans[5001];
	int cnt=0;

	while(1){
	cin>>n;

	if(n==0)break;
	a = new int[n];

	for(int i=0;i<n;i++){
		cin>>a[i];
	}
	int max=-10000000;
	int before=0;
	int now=0;

	for(int i=0;i<n;i++){
		for(int j=i;j<n;j++){
			if(j==i){
				before=a[j];
				now=before;
			}
			else{
				now=before+a[j];
			}
			
			if(max<=now){
				max = now;
	
			}
			before=now;
		}
	}
	ans[cnt]=max;
	//cout<<max<<endl;
	cnt++;

	}
	for(int i=0;i<cnt;i++){
		cout<<ans[i]<<endl;
	}


	return 0;
}

C++: #include <iostream>

using namespace std;

inline int max (int a, int b) {
    return a > b ? a : b;
}

int main (void) {
    int n, i, j;
    while (1) {
        cin >> n;
        if (n == 0) break;
        int a[n];
        for (i = 0; i < n; i++) {
            cin >> a[i];
        }
        int sum = 0, s;
        for (i = 0; i < n; i++) {
            s = 0;
            for (j = i; j < n; j++) {
                s += a[j];
                sum = max(sum, s);
            }
        }
        cout << sum << endl;
    }
    return 0;
}

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

int main(){
  int n;
  int a[5000];
  while(cin >> n && n>0){
    for(int i=0;i>n;i++)
      cin >> a[i];
    int sum=0,tmp=0,max=-100000;
    bool flg=true;
    for(int i=0;i<n;i++){
      if(flg) max=max(max,a[i]);
      if(a[i]>0){
	flg=false;
	sum+=a[i];
	continue;
      }
      for(tmp=sum;a[i]<=0;i++){
	tmp+=a[i];
      }i--;
      if(tmp>0)
	sum=tmp;
      else
	sum=0;
    }

    cout << sum;
  }
}

C++: #include <stdio.h>
#define N 5000

int getsign(int d){
	return d >= 0 ? 1 : -1;
}

int seqsum(int n){
	int a[N];
	int b[N];
	int c = 0;
	int s = 0;

	scanf("%d", a);
	b[0] = a[0];
	s = getsign(a[0]);

	for(int i=1; i<n; ++i){
		scanf("%d", a+i);
		if(s == getsign(a[i])){
			b[c] += a[i];
		}else{
			b[++c] = a[i];
			s = getsign(a[i]);
		}
	}

	int m = a[0] = b[0];
	for(int i=1; i<=c; ++i){
		a[i] = a[i-1] < 0 ? b[i] : a[i-1] + b[i];
		if(m < a[i]){
			m = a[i];
		}
	}

	return m;
}

int main(void){
	int n = 0;
	while(true){
		scanf("%d", &n);
		if(n == 0){ break;}
		printf("%d\n", seqsum(n));
	}
	return 0;
}

C++: #include<stdio.h>
#include <algorithm>
#include <cassert>
#include <cctype>
#include <climits>
#include <cmath>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <iostream>
#include <iterator>
#include <list>
#include <map>     
#include <numeric>
#include <queue>
#include <set>
#include <sstream>
#include <iomanip>
#include <stack>
#include <string>
#include <vector>
using namespace std;
#define ll long long
#define ld long double
#define roop(a,t) for(int a=0;a<t;a++) 
int main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    int n;
    while (cin >> n) {
if(n==0){break;}
        int sum[5001];
        roop(i, n) {
            cin >> sum[i];
            if (i != 0) { sum[i] += sum[i - 1]; }
        }
        int ans = -9000000000;
        for (int i = -1; i < n-1; i++) {
            int sumi = 0;
            if (i != -1)
            {
                sumi = sum[i];
            }
            for (int j = i + 1; j < n; j++) {
 
                int sumj = sum[j];
                ans = max(ans, sumj - sumi);
            }
        }
        cout << ans << endl;
    }
    return 0;
}

C++: #include<iostream>
#include<string>
#include<cstdio>
using namespace std;
int main()
{
	long int n,ans = 0;
	while(cin >> n){
		if(n == 0)break;

		long int a[n];

		for(int i = 0;i < n;i++){
			cin >> a[i];
			ans += a[i];
		}
		cout << ans << endl;
	}
}

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

int main(){
	int n,a[5000],sum=0,out=0;
	while(cin>>n,n){
		sum=0,out=0;
		for(int i=0;i<n;i++)cin>>a[i];
		for(int i=0;i<n;i++){
			sum=a[i];
			for(int j=i+1;j<n;j++){
				sum+=a[j];
				out=max(sum,out);
			}
		}
	cout<<out<<endl;
	}
	return 0;
}

C++: #include <stdio.h>
int array[1000];
int n,i,sum=0,k=0;
void tansaku(int a);
int main(void)
{
	while(1)
	{
		sum = 0;
		for(i=0;i<1000;i++)
		{
			array[i] = 0;
		}
		scanf("%d",&n);
		if(n==0)break;
		for(i=0;i<n;i++)
		{
			scanf("%d",&array[i]);
		}
		for(i=0;i<n;i++)
		{
			tansaku(i);
			k = 0;
		}
		printf("%d\n",sum);
	}
	return 0;
}
void tansaku(int a)
{
	if(a>n)return;
	k += array[a];
	if(k > sum)
	{
		sum = k;
	}
	if(a == n)return;
	tansaku(a+1);
}