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A - 9x9 Editorial by en_translator


For beginners

This problem requires input and output of integers and strings, and arithmetic operations of integers.

Note that this problem asks to accept input containing both digits and characters. For example, we can do as follows:

  1. Receive the three character as a single string.
  2. Find the value when regarding the \(1\)-st character as a digit, and store it as \(A\).
  3. Find the value when regarding the \(3\)-rd character as a digit, and store it as \(B\).
  4. Print \(A\times B\).

For more details on implementation in C++ and Python, refer to the sample code below.

Sample code (C++)

#include <bits/stdc++.h>
using namespace std;

int main() {
    string s;
    cin >> s;  // Receive the input
    int a = (s[0] - '0'); // The value of the 1-st character
    int b = (s[2] - '0'); // The value of the 3-rd character
    cout << a * b << endl;
}

Sample code (Python)

s = input() # Receive the input
a = int(s[0]) # The value of the 1-st character
b = int(s[2]) # The value of the 3-rd character
print(a * b)

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