#include <iostream>
using namespace std;
int main(){
    int a,b,s;
    char c;
    cin>>a>>c>>b;
    if (c=='+'){
        s=a+b;
    }else if(c=='-'){
        s=a-b;
    }else if(c=='*'){
        s=a*b;
    }else if(c=='/'){
        s=a/b;
    }else{
        cout<<"输入错误"<<endl;
    }
    cout<<s<<endl;
    return 0;
}