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#include <string>
#include <vector>
#include <sstream>

using namespace std;

int solution(string my_string) {
    int answer = 0;

    stringstream ss(my_string);
    string c;
    string word;
    while(getline(ss,word,' ')){
        c+=word;
    }

    answer = stoi(c);
    for(int i=1; i<c.size(); i++){
        if(c[i]=='+'){
            i++;
            answer+=c[i] - 48;
        }else if(c[i]=='-'){
            i++;
            answer-=c[i] - 48;
        }
    }

    return answer;
}