Cod sursa(job #1458307)

Utilizator tamionvTamio Vesa Nakajima tamionv Data 7 iulie 2015 12:29:13
Problema Sortare prin comparare Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.85 kb
#include <fstream>
#include <vector>
#include <iterator>
#include <algorithm>
#include <utility>
using namespace std;

template <typename It>
void merge(It st1, It dr1, It st2, It dr2, It rez){
	while(st1 != dr1 && st2 != dr2){
		*rez++ = (*st1 < *st2 ? *st1++ : *st2++); }
	while(st1 != dr1){
		*rez++ = *st1++; }
	while(st2 != dr2){
		*rez++ = *st2++; } }

template <typename It>
void my_mergesort(It st, It dr){
	if(dr-st > 1){
		auto mij = st + (dr-st)/2;
		my_mergesort(st, mij);
		my_mergesort(mij, st);
		vector<int> tmp(dr-st);
		merge(st, mij, mij, dr, begin(tmp));
		copy(begin(tmp), end(tmp), st); } }
		
int main(){
	ifstream f("algsort.in");
	ofstream g("algsort.out");
	int n;
	f >> n;
	vector<int> v(n);
	copy_n(istream_iterator<int>(f), n, begin(v));
	my_mergesort(begin(v), end(v));
	copy(begin(v), end(v), ostream_iterator<int>(g, " "));
	return 0; }