---
tags: 蘿莉控自學
---
> 蘿莉控的C++自學筆記
# c060: 00392 - Polynomial Showdown
連結: https://zerojudge.tw/ShowProblem?problemid=c060
AC(2ms, 316KB)

#include<bits/stdc++.h>
using namespace std;
int a[10];
int main()
{
    int a0;
    while(cin >> a0)
    {
        a[0] = a0;
        bool zero = true;
        for(int i = 1; i < 9; i ++) {
            cin >> a[i];
            if (a[i] != 0) zero = false;
        }
        bool fir = true;
        for(int i = 0; i < 9; i ++)
        {
            if (a[i] == 0 ) continue;
            if (fir)
            {
                if (a[i] > 0)
                {
                    if(i == 8)
                    {
                        if (a[i] < 0)
                        {
                            cout <<  "-" << abs(a[i]) ;
                            continue;
                        }
                        cout << "+" << a[i] ;
                        continue;
                    }
                    if(i == 7)
                    {
                        if (a[i] == 1)
                        {
                            cout << "+" <<"x";
                            continue;
                        }
                        else if(a[i] == -1)
                        {
                            cout << "-"<<"x";
                            continue;
                        }
                        if (a[i] < 0)
                        {
                            cout <<  "-" << abs(a[i]) << "x";
                            continue;
                        }
                        cout << "+" << a[i] << "x";
                        continue;
                    }
                    if (a[i] == 1)
                    {
                        cout << "x^" << 8-i;
                        fir = false;
                        continue;
                    }
                    cout << a[i] << "x^" << 8-i;
                    fir = false;
                    continue;
                }
                else
                {
                    if(i == 8)
                    {
                        if (a[i] < 0)
                        {
                            cout <<  "-" << abs(a[i]) ;
                            continue;
                        }
                        cout << "+" << a[i] ;
                        continue;
                    }
                    if(i == 7)
                    {
                        if (a[i] == 1)
                        {
                            cout << "+" <<"x";
                            continue;
                        }
                        else if(a[i] == -1)
                        {
                            cout << "-"<<"x";
                            continue;
                        }
                        if (a[i] < 0)
                        {
                            cout <<  "-" << abs(a[i]) << "x";
                            continue;
                        }
                        cout << "+" << a[i] << "x";
                        continue;
                    }
                    if (a[i] == -1 && i != 8)
                    {
                        cout <<  "-" << "x^" << 8-i;
                        fir = false;
                        continue;
                    }
                    cout << a[i] << "x^" << 8-i;
                    fir = false;
                    continue;
                }
                if(i == 8)
                {
                    if (a[i] < 0)
                    {
                        cout <<  "-" << abs(a[i]) ;
                        continue;
                    }
                    cout << "+" << a[i] ;
                    continue;
                }
            }
            if(i == 8)
            {
                if (a[i] < 0)
                {
                    cout <<  " - " << abs(a[i]) ;
                    continue;
                }
                cout << " + " << a[i] ;
                continue;
            }
            if(i == 7)
            {
                if (a[i] == 1)
                {
                    cout << " + " <<"x";
                    continue;
                }
                else if(a[i] == -1)
                {
                    cout << " - "<<"x";
                    continue;
                }
                if (a[i] < 0)
                {
                    cout <<  " - " << abs(a[i]) << "x";
                    continue;
                }
                cout << " + " << a[i] << "x";
                continue;
            }
            else if(a[i] > 0)
            {
                if (a[i] == -1 && i != 8)
                {
                    cout <<  " - " << "x^" << 8-i;
                    continue;
                }
                if (a[i] == 1 && i != 8)
                {
                    cout <<" + "<<"x^" << 8-i;
                    continue;
                }
                cout << " + " << a[i] << "x^" << 8-i;
            }
            else
            {
                cout << " - " <<abs(a[i]) << "x^" << 8-i ;
            }
        }
        if (zero) cout << 0 <<endl;
        else cout << endl;
    }
}