```cpp
#include <bits/stdc++.h>
using namespace std;
int main()
{
int n,a[1000];
cin>>n;
if(n==0){
cin>>a[1];
cout<<a[1];
return 0;
}
for(int i=n;i>=0;i--)
cin>>a[i];
for(int i=n;i>=0;i--){
if(a[i]==0)
continue;
if(i==1){
if(a[i]>=1)
cout<<"+";
if (abs(a[i]) != 1)
cout<<a[i]<<"x";
else
cout << "x";
}
else if(i==n){
if(a[i]<0)
cout<<"-";
if(a[i]==1||a[i]==-1)
cout<<"x^"<<n;
else
cout<<abs(a[i])<<"x^"<<n;
}
else if(i==0){
if(a[i]<0)
cout<<"-";
else
cout<<"+";
cout<<abs(a[i]);
}
else{
if(a[i]<0)
cout<<"-";
else
cout<<"+";
if(a[i]==1||a[i]==-1)
cout<<"x^"<<i;
else
cout<<abs(a[i])<<"x^"<<i;
}
}
return 0;
}
```
by weicongjun @ 2024-03-17 10:23:01
你输入
40
1 0 5 -2 -1 -5 4 -2 -4 1 -2 -5 4 2 -4 5 -4 -3 0 -4 -4 -1 -5 -3 3 1 5 1 5 2 4 2 0 2 -3 3 5 -2 3 -2 1
应该输出
x^40+5x^38-2x^37-x^36-5x^35+4x^34-2x^33-4x^32+x^31-2x^30-5x^29+4x^28+2x^27-4x^26+5x^25-4x^24-3x^23-4x^21-4x^20-x^19-5x^18-3x^17+3x^16+x^15+5x^14+x^13+5x^12+2x^11+4x^10+2x^9+2x^7-3x^6+3x^5+5x^4-2x^3+3x^2-2x+1
你的输出
x^40+5x^38-2x^37-x^36-5x^35+4x^34-2x^33-4x^32+x^31-2x^30-5x^29+4x^28+2x^27-4x^26+5x^25-4x^24-3x^23-4x^21-4x^20-x^19-5x^18-3x^17+3x^16+x^15+5x^14+x^13+5x^12+2x^11+4x^10+2x^9+2x^7-3x^6+3x^5+5x^4-2x^3+3x^2--2x+1
最后的不是输出 --2x
by weicongjun @ 2024-03-17 10:25:01
```cpp
if(i==1){
if(a[i]>=1)
cout<<"+";
else
cout << "-";
if (abs(a[i]) != 1)
cout<<a[i]<<"x";
else
cout << "x";
}
```
改成
```cpp
if(i==1){
if(a[i]>=1)
cout<<"+";
if (abs(a[i]) != 1)
cout<<a[i]<<"x";
else
cout << "x";
}
```
把
```cpp
else
cout << "-";
```
去掉
by weicongjun @ 2024-03-17 10:26:40