#include<iostream> using namespace std; int main() { int n; cin >> n; int a[n]; for (int i = 0; i <= n; i++) { cin >> a[i]; } int x, b; cin >> x >> b; for (int i = 1; i <= n; i++) { if (i == x) { a[i] = b; } } for (int i = 0; i <= n; i++) { cout << a[i]; } return 0; }