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#include <iostream>
#include <regex>
#include <string>
#include <cctype>
using namespace std;

bool check_camelCase(string x){
	int len = x.length();
	if(len > 10){
		return false;
	}
	char y[len];
	strcpy(y, x.c_str());
	int count = 0;
	for(int i = 0; i < len; i++){
		if(isupper(y[i])){
			count++;
		}
	}
	if(count == 1){
		return true;
	}
	else{
		return false;
	}
	return true;
}

bool check_Number(string x){
	int len = x.length();
	if(len > 10){
		return false;
	}
	char y[len];
	strcpy(y, x.c_str());
	for(int i = 0; i < len; i++){
		if((i!=0 && isdigit(y[i])) || (i!=len-1 && isdigit(y[i]))){
			return false;
		}
	}
	return true;
}

bool check_Keywords(string x){
	string keywords[] = {"int", "cin", "cout", "float" , "endl", "strcpy", "return" , "false" , "true" , "void", "bool"};
	int len1 = sizeof(keywords)/sizeof(keywords[0]);
	for(int i = 0 ; i < len1 ; i++){
		if(x == keywords[i]){
			return 0;
		}
	}
	return 1;
}

int main(){
	string x;
	cout<<"Enter a variable: ";
	cin >> x;
	cout << (check_camelCase(x)&&check_Number(x)&&check_Keywords(x)) << endl;
}

//rules:
/*
1) camelcasing only 
2) max length 10
3) can't have integer in between them 
4) must not start with caps
*/