Submission #1231606

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Source Code Expand

#include<string>
#include<algorithm>
#include<iostream>
#include<cstdio>
	using namespace std;

	int main()
	{
		int n;
		cin >> n;
		bool flag = false
			;
		int a = 0; int un = 0;
		for (int i = 0; i < n; i++) {
			string s;
			cin >> s;
			if (!flag) {
				if (s == "A") { a++; }
				else if (s == "Un") { un++; }
				if (un > a)
				{
					flag = true;
				}
			}
			if (i == n - 1) {
					cout << !flag &&a == un ? "YES": "NO";
				}
			
		}cout << endl;
		return 0;
	}

Submission Info

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