isDx.cpp

bool doiXung(string s, long long length){

	if(length == 1){
		return true;
	}
	bool dx = false;
	long long i, j;
	i = 0;
	j = length - 1;
	while(s[i] == s[j]){
		if(i >= j){
			dx = true;
		}

		i++;
		j--;
	}

	return dx;
}