#include <iostream>

using namespace std;

int main()
{
    char str[100] = "";
    cin >> str;
    long num = 0;
    int k = 0;
    if(str[0] == 45){
        num = (str[1] - 48);
        k = 2;
    }
    else {
        num = str[k] - 48;
        k++;
    }
    if(str[0] == 48){
        num = 0;
        cout << num << endl;
        return 0;
    }
    while(str[k] != 0){
        num = num*10 + str[k] - 48;
        k++;
    }
    if(str[0] == 45) num = num*-1;
     cout << num << endl;

    return 0;
}