Cod sursa(job #2322829)

Utilizator KryegerIix Yygreg Kryeger Data 18 ianuarie 2019 14:28:08
Problema Subsecventa de suma maxima Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.06 kb

#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm>

using std::cin;
using std::cout;

using std::ifstream;
using std::ofstream;

using std::vector;

using std::max;

int l = 0, r = 0;

int divide(vector<int> v, int left, int right) {

	if (left == right) return max(0, v[left]);

	int mid = (left + right) / 2;
	int s_left = 0, s_right = 0, s = 0;

	int r1 = divide(v, left, mid);
	int r2 = divide(v, mid + 1, right);

	for (int i = mid; i >= left; i--) {
		s += v[i];
		if (s_left < s) {
			s_left = s;
			l = i;
			cout << "l = " << l << " (" << left << ", " << right << ")\n";
		}
	}

	s = 0;

	for (int i = mid + 1; i <= right; i++) {
		s += v[i];
		if (s_right < s) {
			s_right = s;
			r = i;
		}
	}

	int r3 = s_left + s_right;
	return max<int>(r1, max<int>(r2, r3));
}

int main(){
	ifstream in("ssm.in");
	ofstream out("ssm.out");
	
	vector<int> v;
	int n; in >> n;
	int x;

	while (n--) {
		in >> x;
		v.push_back(x);
	}

	out << divide(v, 0, v.size() - 1);
	out << l << " " << r;
}