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Cod sursa(job #484736)
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
long a[500010], n, k, i;
inline void swap(long p1, long p2) {
a[ p1 ] = a[p2 ] ^ a[ p1] ^( a[p2] = a[ p1 ]);
}
void rec(long in1, long in2) {
if (in1 >= in2) return;
if (in1 + 1 == in2) {
if (a[in1] > a[in2]) {
swap(in1, in2);
}
return;
}
long poz = rand() % (in2 - in1 + 1) + in1, num = 0, in4 = 0;
int num2 = 0;
for (long i = in1; i <= in2; ++i) {
if (a[i] < a[poz]) {
++num;
}
else if( a[i ] == a[poz]) num2++;
}
swap(poz, in1 + num);
int t = a[ in1 + num];
in4 = in1 + num + 1;
int in5 = in2;
for (long i = in1; i <= in1 + num - 1; ++i) {
while (a[i] >= t ) {
if( a[ i ] > t) {
a[ i ] = a[ in5] ^ a[ i ] ^( a[ in5 ] = a [ i ] );
in5--;
}
if( a[ i ] == t) {
a[ i ] = a[ in4] ^ a[ i ] ^( a[ in4 ] = a [ i ] );
in4++;
}
}
}
rec(in1, in1 + num);
rec(in1 + num + 1, in2);
}
int main() {
srand(100);
freopen("algsort.in", "r", stdin);
freopen("algsort.out", "w", stdout);
scanf("%ld", &n);
for (i = 1; i <= n; ++i) {
scanf("%ld", &a[i]);
}
/*for( int i = n; i> 1; i--){
printf("%ld ", a[i]);
}
printf("%d\n",a[1]);*/
rec(1, n);
for (i = 1; i < n; ++i) {
printf("%ld ", a[i]);
}
printf("%ld\n",a[n]);
return 0;
}