保证AC

#include <bits/stdc++.h>
using namespace std;
int main() {
    int n, b, c; 
    cin >> n >> b >> c;
    int a[n]; 
    for (int i = 0; i < n; i++) { 
        cin >> a[i];
    }
    b--; 
    c--;
    int temp = a[b];
    a[b] = a[c];
    a[c] = temp;
    for (int i = 0; i < n; i++) {
        cout << a[i] << " ";
    }
}