ctci/16. Moderate problems/16.17. 2016_max_subarray.cpp

46 lines
1.1 KiB
C++

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
int maxSubArraySum(vector<int> a, int size)
{
int max_so_far = 0, max_ending_here = 0;
for(int i = 0; i<size; i++){
max_ending_here = max_ending_here + a[i];
if(max_ending_here < 0) max_ending_here = 0;
else if(max_so_far < max_ending_here) max_so_far = max_ending_here;
}
return max_so_far;
}
int main()
{
unsigned int testcases, n = 0;
cin >> testcases;
while(testcases--){
cin >> n;
vector<int> x(n);
int cont = 0, noncont = 0, negmaxpos, negmax = 0;
for(size_t i = 0; i<n; ++i){
cin >> x[i];
if(x[i] > 0) noncont += x[i];
if(x[i] < negmax){
negmaxpos = i;
negmax = x[i];
}
}
if(n == 1){
cont = x[0]; noncont = cont;
}else if(negmax == 0) cont = noncont; // all positive
else if(noncont == 0){ // all negative
sort(x.begin(),x.end());
cont = x[n-1]; noncont = cont;
}else cont = maxSubArraySum(x,n);
cout << cont << " " << noncont << endl;
}
return 0;
}