import java.util.Scanner;
public class Main {
public static void main
(String[] args
) { Scanner scanner
= new Scanner
(System.
in);
int A = scanner.nextInt();
char S = scanner.next().charAt(0);
int B = scanner.nextInt();
char Q = scanner.next().charAt(0);
int C = scanner.nextInt();
scanner.close();
int correctAnswer = 0;
switch (S) {
case '+':
correctAnswer = A + B;
break;
case '-':
correctAnswer = A - B;
break;
case '*':
correctAnswer = A * B;
break;
}
if (correctAnswer == C) {
} else {
System.
out.
println(correctAnswer
); }
}
}
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