#include <bits/stdc++.h> using namespace std ; void out_ARR( int a[] , int n){ for ( int i = 0 ; i < n ; i++){ cout<<" "<<a[i]; } cout<<endl; } void merge(int a[] ,int n ,int p ,int q, int r){ int b[n]; int i ,j,k; k = 0; i = p; j = q + 1; while( i <= q && j <= r ){ if(a[i] < a[j]) b[k++] = a[i++]; else b[k++] = a[j++]; } while( i <= q) b[k++] = a[i++]; while(j <= r ) b[k++] = a[j++]; for( i = r ; i >= p ; i--) a[i] = b[--k]; } void mergeSort( int a[], int n,int p ,int r){ int q; if( p < r ){ q = (p + r)/2; mergeSort(a,n,p,q); mergeSort(a,n,q+1,r); merge(a,n,p,q,r); } } int main(){ int n ; cin>>n; int *arr; arr = new int[n]; for ( int i = 0 ; i < n ; i++){ cin>>arr[i]; } cout<<" input : "; out_ARR(arr,n); mergeSort(arr, n,0,n-1); cout<<"\n output Merge : "; out_ARR(arr, n); }
Standard input is empty
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