Test

#include <iostream>
#include <vector>
#include <stdlib.h>
using namespace std;



vector<int> strToVector(const string& s) {
    bool reading_num = 1;
    bool reading_sign = 1;
    bool reading_degree = 0;
    int sign = 1;
    int num = 0;
    int degree;
    bool is_first = 1;
    vector<int> coef(20);
    for (const char& c: s) {
        if (reading_num == 1 && isdigit(c)) {
            num = num*10 + c - '0';
        }

        if (reading_degree && isdigit(c)) {
            degree = degree*10 + c - '0';
        }

        if (reading_sign == 1) {
            if (c == '+') {
                num = max(1, num);
                degree = max(1, degree);
                coef[degree] = sign*num;
                num = 0;
                sign = 1;
                reading_num = 1;
                degree = 0;
                reading_degree = 0;
            } else if (c == '-') {
                num = max(1, num);
                degree = max(1, degree);
                coef[degree] = sign*num;
                num = 0;
                sign = -1;
                reading_num = 1;
                degree = 0;
                reading_degree = 0;
            }
        }

        if (c == 'x') {

            reading_num = 0;
            reading_sign = 0;
            degree = 0;
            reading_degree = 1;
            reading_sign = 1;
        }


    }
    return coef;
}

int main() {
    string s;
    cin >> s;
    vector<int> vec = strToVector(s);
    for (int i = 0; i < vec.size(); ++i) {
        if (vec[i]) {
            cout << i << " - " << vec[i] << endl;
        }
    }
    return 0;
}