Cod sursa(job #3005347)

Utilizator AndPitAndreeaPiticar AndPit Data 16 martie 2023 21:42:49
Problema Sortare prin comparare Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.7 kb
#include <fstream>
using namespace std;
ifstream f("algsort.in");
ofstream g("algsort.out");
#define NX 500010
int N, A[NX], B[NX];

void merge_sort(int l, int r) {
    int m = (l + r) >> 1, i, j, k;

    if( l == r ) return;

    merge_sort( l, m );
    merge_sort( m + 1, r );

    for( i = l, j = m+1, k = l; i <= m || j <= r; )
        if( j > r || (i <= m && A[i] < A[j]) )
            B[ k++ ] = A[ i++ ];
        else
            B[ k++ ] = A[ j++ ];
    for( k = l; k <= r; k++ )
        A[k] = B[k];
}

int main() {
    int i;
    f>>N
    for( i = 1; i <= N; i++ )
        f>>A[i];
    merge_sort( 1, N );
    for( i = 1; i <= N; i++ )
        g<<A[i]<<' ';
    return 0;
}