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Makx Sum: KSUBSUM

Problem Link

#include <iostream>
#include <cstdio>
#include <queue>
#include <cstring>
#include <algorithm>

#define sf(i) scanf("%d",&i)
#define pf(i) printf("%d ", i)
using namespace std;

const int N = 10000;

int main()
{
    int t, n, k1, k2, k3;
    int arr[N + 1];
    int sum[2015];
    int index;
    long s, val;

    sf(t);
    while(t--)
    {
        sf(n), sf(k1), sf(k2), sf(k3);

        priority_queue<long, vector<long>, greater<long>> pq;

        index = 0;

        s = 0;

        for(int i = 0; i < n; i++)
        {
            sf(arr[i]);
        }

        for(int i = 1; i < n; i++)
        {
           arr[i] += arr[i - 1];
        }

        for(int i = 0; i < n; i++)
        {
            for(int j = i; j < n; j++)
            {
                if(i == 0)
                {
                    val = arr[j];
                }
                else
                {
                    val = arr[j] - arr[i - 1];
                }

                if(index < k3)
                {
                    pq.push(val);
                    index++;
                }
                else
                {
                    long minVal = pq.top();
                    if(val > minVal)
                    {
                        pq.pop();
                        pq.push(val);
                        index++;
                    }
                }

            }
        }

        int k = k3 - 1;

        while(!pq.empty())
        {
            sum[k--] = pq.top();
            pq.pop();
        }

        printf("%d %d %d\n",sum[k1 - 1],sum[k2 - 1],sum[k3 - 1]);

    }
    return 0;
}

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