Submission #60036768

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#include <bits/stdc++.h>
using namespace std;
#define int long long
#define fastio ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define nl "\n";
#define inf LLONG_MAX
#define pb push_back
#define pi pair<int, int>
#define mp make_pair
#define ff first
#define ss second
#define show(x) cerr << #x << " is " << x << nl;
#define showw(x, y) cerr << #x << " is " << x << " " << #y << " is " << y << nl;
#define showall(x) cerr << #x << " is "; for (auto i : x) {cerr << i << " ";} cerr << nl;
signed main(){
  fastio
  int n;
  cin >> n;
  string s;
  cin >> s;
 
 
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#include <bits/stdc++.h>
using namespace std;
#define int long long
#define fastio ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define nl "\n";
#define inf LLONG_MAX
#define pb push_back
#define pi pair<int, int>
#define mp make_pair
#define ff first
#define ss second
#define show(x) cerr << #x << " is " << x << nl;
#define showw(x, y) cerr << #x << " is " << x << " " << #y << " is " << y << nl;
#define showall(x) cerr << #x << " is "; for (auto i : x) {cerr << i << " ";} cerr << nl;

signed main(){
	fastio
	int n;
	cin >> n;
	string s;
	cin >> s;
	if(n%2==0){
		cout << "No" << nl;
		return 0;
	}
	bool pos = true;
	int mid = (n-1)/2;
	for (int i=0; i<mid; i++){
		if(s[i]!='1'){
			pos = false;
			break;
		}
	}
	if(s[mid]!='/') {
		pos = false;
	}
	for (int i=mid+1; i<n; i++){
		if(s[i]!='2'){
			pos = false;
			break;
		}
	}
	if(pos) {
		cout << "Yes" << nl;
	}
	else cout << "No" << nl;
    return 0;
}

Submission Info

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