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Copy pathmergeSort.cpp
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63 lines (60 loc) · 746 Bytes
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#include<iostream>
using namespace std;
void merge(int aa[], int min, int mid,int max)
{
int tmp[50000],i,j,k,m;
j=min;
m=mid+1;
for(i=min;j<=mid&&m<=max;i++)
{
if(aa[j]<=aa[m])
{
tmp[i]=aa[j];
j++;
}
else
{
tmp[i]=aa[m];
m++;
}
}
if(j>mid)
{
for(k=m;k<=max;k++)
{
tmp[i]=aa[k];
i++;
}
}
else
{
for(k=j;k<=mid;k++)
{
tmp[i]=aa[k];
i++;
}
}
for(k=min;k<=max;k++)
aa[k]=tmp[k];
}
void mergeSort(int aa[], int a, int b)
{
int mid;
if(a<b)
{
mid=(a+b)/2;
mergeSort(aa,a,mid);
mergeSort(aa,mid+1,b);
merge(aa,a,mid,b);
}
}
int main(){
int n; cin>>n;
int a[n];
for(int i=0;i<n;i++)
cin>>a[i];
mergeSort(a,0,n-1);
for(int i=0;i<n;i++)
cout<<a[i]<<" ";
cout<<endl;
}