Created
October 11, 2017 17:11
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#include <iostream> | |
#include <cmath> | |
using namespace std; | |
int main() { | |
// x3 + ax2 + bx + c; x2 + gx + h | |
long long int a, b, c, d, e, f, g, h, j, temp, z; | |
cin >> a >> b >> c; | |
// cout << "a = " << a << ", b = " << b << ", c = " << c << endl; | |
if(a==0 && b==0 && c==0){ | |
cout << "0 0 0"; | |
return 0; | |
} | |
else if(b==0 && c==0){ | |
d = 0; e = 0; f = a; | |
} | |
else if(c==0){ | |
f = 0; | |
g = a; | |
h = b; | |
for(int j=abs(b/2); j>=-abs(b/2); j--){ | |
z = pow(-j, 2) + g * (-j) + h; | |
// cout << z << endl; | |
if(z == 0){ | |
d = j; | |
e = b / d; | |
// cout << "d = " << d << ", e = " << e << endl; | |
} | |
} | |
} | |
else{ | |
// cout << "Yes"; | |
for(int i=abs(c/2); i>=-abs(c/2); i--){ | |
if(i==0 || c%i == 0){ | |
// cout << "here" << endl; | |
z = pow(-i, 3) + a * pow(-i, 2) + b * (-i) + c; | |
// cout << "z = " << z << ", i = " << i << endl; | |
if(z == 0){ | |
// cout << "f = " << i << endl; | |
f = i; | |
g = a - f; | |
h = c / f; | |
// cout << g << ' ' << h << endl; | |
// 現在 f 已經確定,用長除法變成二次式 | |
for(int j=i; j>=-abs(c/2); j--){ | |
z = pow(-j, 2) + g * (-j) + h; | |
// cout << "z = " << z << ", j = " << j << endl; | |
if(z == 0){ | |
e = j; | |
d = c / i / j; | |
goto end; | |
} | |
} | |
} | |
} | |
} | |
} | |
end: | |
if(d>e){ | |
temp = d; | |
d = e; | |
e = temp; | |
} | |
if(e>f){ | |
temp = f; | |
f = e; | |
e = temp; | |
} | |
if(d>e){ | |
temp = d; | |
d = e; | |
e = temp; | |
} | |
cout << d << ' ' << e << ' ' << f; | |
} |
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Nee How ban!!