zkx06111's Blog

//90分，不想改了，用求根公式求两根即可
#include <iostream>
#include <cstdio>
#include <cmath>
using namespace std;

unsigned long long a[3];

string edit(int x) {
	string num="";
	if (x==0) return "x";
	int t=abs(x);
	while (t) {
		num+=t%10+'0';
		t/=10;
	}
	for (int i=0;i<num.size()/2;++i)
		swap(num[i],num[num.size()-i-1]);
	if (x>0) return "(x+"+num+")";
	else return "(x-"+num+")";
	return 0;
}

int main() {
    //freopen("in.txt","r",stdin);
	a[2]=1;
	int x; char c;
	while ((c=getchar())!=EOF) {
		if (c!='+' && c!='-') continue;
		int t; cin>>t; //cout<<'!';
		if (getchar()==EOF) {
			a[0]=t;
			if (c=='-') a[0]*=-1;
            break;
		}
		else {
            if (t==0) a[1]=1;
			else a[1]=t;
			if (c=='-') a[1]*=-1;
		}
	}
	//cout<<a[1]<<' '<<a[0]<<endl;
	int delta=sqrt(a[1]*a[1]-4*a[0]);
	int x2=(-a[1]+delta)/-2,x1=(-a[1]-delta)/-2;
	//cout<<delta<<' '<<x1<<' '<<x2<<endl;
	string s1=edit(x1),s2=edit(x2);
	if (s1==s2) cout<<s1<<"^2";
	else cout<<s1<<s2;
	return 0;
}