Atcoder Beginner Contest 381-A - 11/22 String

#include <bits/stdc++.h>
using namespace std;

signed main() {
	ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	int n; string s;
	cin >> n >> s;
	if (n & 1) {
		for (int i = 0; i < n / 2; i++) if (s[i] != '1') { cout << "No" << endl; return 0; }
		if (s[n / 2] != '/') { cout << "No" << endl; return 0; }
		for (int i = n / 2 + 1; i < n; i++) if (s[i] != '2') { cout << "No" << endl; return 0; }
		cout << "Yes" << endl;
		return 0;
	}
	cout << "No" << endl;
    return 0;
}