Submission #1185351

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Source Code Expand

#define _USE_MATH_DEFINES
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include<iomanip>

//#include<bits/stdc++.h>


using namespace std;



int main() {
	string p;
	cin >> p;
	int t = 0;
	bool f = 0;
	for (int i = 0; i < p.size(); i++) {
		t = 0;
		if (p[i] == 'B')t = 2;
		if (p[i] == 'A' || p[i] == 'D' || p[i] == 'O' || p[i] == 'P' || p[i] == 'Q' || p[i] == 'R')t = 1;
		if (i == 0 && t)f = 1;
		if (i == 1 && t)f = 1;
		if (i == 2 && t != 1)f = 1;
		if (i == 3 && t)f = 1;
	}
	if (!f)cout << "yes" << endl;
	else cout << "no" << endl;
	return 0;

}

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