PAT甲级 1132. Cut Integer (20)

https://www.patest.cn/contests/pat-a-practise/1132

Cutting an integer means to cut a K digits long integer Z into two integers of (K/2) digits long integers A and B. For example, after cutting Z = 167334, we have A = 167 and B = 334. It is interesting to see that Z can be devided by the product of A and B, as 167334 / (167 x 334) = 3. Given an integer Z, you are supposed to test if it is such an integer.

Input Specification:

Each input file contains one test case. For each case, the first line gives a positive integer N (<= 20). Then N lines follow, each gives an integer Z (10<=Z<=2³¹). It is guaranteed that the number of digits of Z is an even number.

Output Specification:

For each case, print a single line "Yes" if it is such a number, or "No" if not.

Sample Input:

3
167334
2333
12345678

Sample Output:

Yes
No
No

#include
#include
using namespace std;

int countDigit(int num)
{
	int digit = 0;
	while (num>0)
	{
		num /= 10;
		digit++;
	}
	return digit;
}

int main()
{
	int N;
	cin >> N;
	for (int i = 0; i> input;
		digit = countDigit(input);
		digit /= 2;
		num = pow((double)10, (int)digit);
		left = input / num;
		right = input%num;
		if (left*right == 0)
			cout << "No" << endl;
		else
			if (input % (left*right) == 0)
				cout << "Yes" << endl;
			else
				cout << "No" << endl;

	}
	return 0;
}