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#include <string>
#include <vector>
#include <math.h>
using namespace std;

int solution(string s) {
    int answer = 0;
    int sign = 1,start=0,val;
    if(s[0]=='-'){
        sign = -1;
        start =1;
    }
    else if(s[0]=='+'){
        sign = 1;
        start =1;
    }
    else{}
    val=(int)s.length() - 1;
    for(int i=start;i<s.length();i++){
        answer +=(s[i]-48)*pow(10,val-i);
    }
    answer *= sign ;
    return answer;
}