#include <iostream>
using namespace std;
int main() {
// Input
int a, b;
char c;
cin >> a >> b >> c;
// Process -> Output
if (c == '+') cout << a + b;
else if (c == '-') cout << a - b;
else if (c == '*') cout << a * b;
else if (c == '/') cout << (float)a / b;
return 0;
}
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