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Cod sursa(job #744457)
#include<vector>
#include<fstream>
using namespace std;
void merge(vector<int>&, int, int, int);
void merge_sort(vector<int>& v, int left, int right)
{
if(left==right)
return;
int mij=left+(right-left)/2;
merge_sort(v,left,mij);
merge_sort(v,mij+1,right);
merge(v,left,mij,right);
}
void merge(vector<int>& v, int left, int mij, int right)
{
vector<int> aux;
int i=left,j=mij+1;
while(i<=mij && j<=right)
{
if(v[i]<=v[j])
{
aux.push_back(v[i]);
++i;
}
else
{
aux.push_back(v[j]);
++j;
}
}
while(i<=mij)
{
aux.push_back(v[i]);
++i;
}
while(j<=right)
{
aux.push_back(v[j]);
++j;
}
for(int i=left;i<=right;++i)
v[i]=aux[i-left];
}
int main()
{
ifstream in("algsort.in");
ofstream out("algsort.out");
int n;
vector<int> v;
in>>n;
int nr;
for(int i=0;i<n;++i)
{
in>>nr;
v.push_back(nr);
}
merge_sort(v,0,n-1);
for(int i=0;i<n;++i)
out<<v[i]<<" ";
out<<endl;
}