2.有趣的任务

#include <iostream>
#include <vector>
using namespace std;
int main() {
int n, b, c;
cin >> n >> b >> c;
vector<int> a(n);
for (int i = 0; i < n; ++i) {
cin >> a[i];
}
swap(a[b-1], a[c-1]);
for (int i = 0; i < n; ++i) {
if (i != 0) {
cout << " ";
}
cout << a[i];
}
cout << endl;
return 0;
}