#include <bits/stdc++.h>
using namespace std;
int n, num[25], a, b, c, d;
int main()
{
	cin >> n;
	for (int i = 1; i <= n; i++)
		cin >> num[i];
	cin >> a >> b >> c >> d;
	for (int i = a, j = c; i <= b, j <= d; i++, j++)
		swap(num[i], num[j]);
	for (int i = 1; i <= n; i++)
		cout << num[i] << " ";
	return 0;
}

短小精悍的代码

直接硬钢

#include<bits/stdc++.h>
using namespace std;
int n,a[22],x1,x2,y3,y2;
bool x3,y4;
int main()
{
    cin>>n;
    for (int i=1;i<=n;i++)
        cin>>a[i];
    cin>>x1>>x2>>y3>>y2;
    for (int i=1;i<=n;i++)
    {
        if (i==x1&&!x3)
        {
            for (int j=y3;j<=y2;j++)
                cout<<a[j]<<" ";
            i=x2;
            x3=1;
            continue;
        }
        if (i==y3&&!y4)
        {
            for (int j=x1;j<=x2;j++)
                cout<<a[j]<<" ";
            i=y2;
            y4=1;
            continue;
        }
        cout<<a[i]<<" ";
    }
    return 0;
}

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a[30],n,x1,x2,y1,y2;
	cin >> n;
	for(int i = 1; i <= n; i++) cin >> a[i];
	cin >> x1 >> x2;
	cin >> y1 >> y2;
	for(int i = x1,j = y1; i <= x2, j <= y2; i++,j++){
		swap(a[i],a[j]);
	}
	for(int i = 1; i <= n; i++) cout << a[i] << " ";
	return 0;
}