Cod sursa(job #789323)

Utilizator ephgstefana gal ephg Data 17 septembrie 2012 20:19:56
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.71 kb
#include <cstdio>
#define BM 500005
int a[BM],ad[BM],dim;
void intcl(int i1,int j1,int i2,int j2){
	dim=0;
	int i=i1,j=i2;
	for(;i<=j1&&j<=j2;){
		if(a[i]<a[j]){
			ad[++dim]=a[i];
			++i;
		}
		else {
			ad[++dim]=a[j];
			++j;
			}
	}
	for(;i<=j1;++i)ad[++dim]=a[i];
	for(;j<=j2;++j)ad[++dim]=a[j];
	for(i=i1;i<=j2;++i)a[i]=ad[i-i1+1];
}
void merge_sort(int i,int j){
	int mij=(i+j)/2;
	if(i==j)return;
	merge_sort(i,mij);
	merge_sort(mij+1,j);
	intcl(i,mij,mij+1,j);
}
int main () {
	int n,i;
	freopen("algsort.in","r",stdin);
	freopen("algsort.out","w",stdout);
	scanf("%d",&n);
	for(i=1;i<=n;++i)scanf("%d",&a[i]);
	merge_sort(1,n);
	for(i=1;i<=n;++i)printf("%d ",a[i]);
	return 0;
}