Rokua P1067 Polynomial output simulation

https://www.luogu.org/problemnew/show/1067

Topic:

Title Description

The unary n-th polynomial can be expressed as follows:

Where Aixi is called i-th term, the AI is called the coefficient of i-th term. Given the number of times and coefficients for a unary polynomial, output the polynomial in the format required as follows:

1. In the polynomial, the argument is x, and the polynomial is given in descending order of the number of times from left to right.

2. Only items with a factor not 0 are included in the polynomial.

3. If the polynomial n coefficient is positive, the "+" sign does not appear at the beginning of the polynomial, if the polynomial n-th

Number is negative, the polynomial begins with the "-" sign.

4. For items that are not the highest, connect to the previous item with a "+" or "-", respectively, to indicate this

The coefficients are positive or the coefficients are negative. followed by a positive integer that represents the absolute value of this coefficient (if an item is more than 0 times

The absolute value of the coefficients is 1, no output 1 is required. If the exponent of x is greater than 1, then the shape of the exponential part that follows

The formula is "X^b", where B is the exponent of X, and if the exponent of X is 1, then the exponential part that follows is "X";

If the exponent of x is 0, only the output coefficients are required.

5. In polynomial, the beginning and end of a polynomial does not contain extra spaces. Input output format input format:

Enter a total of 2 lines

The first row of 1 integers, n, represents the number of times a unary polynomial is.

The second line has n+1 integers, where the i integer represents the coefficients of the n-i+1, with an empty space between every two integers

separated by a grid.

Output format:

Output a total of 1 lines, according to the format of the topic output polynomial.

Code:

#include <bits/stdc++.h>
using namespace std;
int main ()
{
    int A;
    int n;
    cin>>n;
    for (int i=n;i>=0;i--) {
		cin>>a;
		if (a) {
			if (a>0&&i!=n) cout<< "+";	Positive Sign Output
			if (a>1| | a<-1| | i==0) cout<<a;
			if (a==-1&&i) cout<< '-';
			if (i>1) cout<< "x^" <<i;
			if (i==1) cout<< "x";
		}
    }
    cout<<endl;
    return 0;
}