#include <stdio.h> int main() { int a[101],n,i,t; scanf("%d",&n); for(i = 1; i <= n; i++) scanf("%d",&a[i]); for(i = 1; i <= n; i++) if(i%2 == 0) { t = a[i]; a[i] = a[i-1]; a[i-1] = t; } for(i = 1; i <= n; i++) printf("%d ",a[i]); ...

#include <iostream> using namespace std; const int N = 110; int n, a[N]; int main() { cin >> n; for (int i = 1; i <= n ; i ++ ) { cin >> a[i]; if (i % 2 == 0) swap(a[i], a[i - 1]); } for (int i = 1; i <= n ; i ++ ) cout << a[i] <&l...

 public static void main(String[] args) {         try(Scanner scanner = new Scanner(System.in)){             int len = scanner...