Cod sursa(job #2252644)

Utilizator test_accNo Name test_acc Data 2 octombrie 2018 21:30:16
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.24 kb
#include <vector>
#include <fstream>

using namespace std;

ifstream f("algsort.in");
ofstream g("algsort.out");

void combine(int left, int middle, int right, vector<int> &toSort) {
	vector<int> combined;
	int crt_left = left;
	int crt_right = middle + 1;

	while (crt_left <= middle && crt_right <= right) {
		if (toSort[crt_left] < toSort[crt_right]) {
			combined.push_back(toSort[crt_left]);
			crt_left += 1;
		}
		else {
			combined.push_back(toSort[crt_right]);
			crt_right += 1;
		}
	}

	for (; crt_left <= middle; crt_left++)
		combined.push_back(toSort[crt_left]);

	for (; crt_right <= right; crt_right++)
		combined.push_back(toSort[crt_right]);

	for (int i = 0; i < combined.size(); i++) 
		toSort[left + i] = combined[i];
}

void mergeSort(int left, int right, vector<int> &toSort) {
	if (right == left)
		return;

	int middle = (left + right) / 2;
	
	mergeSort(left, middle, toSort);
	mergeSort(middle + 1, right, toSort);
	combine(left, middle, right, toSort);
}

int main()
{
	int n;
	vector<int> toSort;
	
	f >> n;
	int el;
	for (int i = 0; i < n; i++) {
		f >> el;
		toSort.push_back(el);
	}

	mergeSort(0, n - 1, toSort);
	for (auto elem : toSort)
		g << elem << " ";

	return 0;
}