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-rw-r--r--introductory_problems/permutations.cpp18
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diff --git a/introductory_problems/permutations.cpp b/introductory_problems/permutations.cpp
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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);
+ }
+}