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// 1070. Permutations
#include <bits/stdc++.h>
using namespace std;
int main() {
static int num;
scanf("%d", &num);
if (num == 1)
printf("1 ");
else if (num <= 3)
printf("NO SOLUTION\n");
else {
for (int i = 2; i <= num; i += 2)
printf("%d ", i);
for (int i = 1; i <= num; i += 2)
printf("%d ", i);
}
}
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