PAT甲级——A1132 Cut Integer

Cutting an integer means to cut a K digits lone 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 × 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 <). 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 <iostream>
#include <string>
using namespace std;
int main()
{
    int n, num, a, b;
    cin >> n;
    while (n--)
    {
        string str, str1, str2;
        cin >> str;
        str1.assign(str.begin(), str.begin() + str.length() / 2);
        str2.assign(str.begin() + str.length() / 2, str.end());
        num = atoi(str.c_str());
        a = atoi(str1.c_str());
        b = atoi(str2.c_str());
        if ((a*b) > 0 && num % (a*b) == 0)
            cout << "Yes" << endl;
        else
            cout << "No" << endl;
    }
    return 0;
    
}