#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main() { long long a,b; char op; cin>>a>>op>>b; switch(a){ case '+':cout<<a+b; break; case '-':cout<<a-b; break; case '*':cout<<a*b; break; case '/':cout<<a/b; break; //default: //cout<<; //break; } return 0; }