CF21B.Intersection

普及/提高-

通过率：0%

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题目描述

You are given two set of points. The first set is determined by the equation $A_{1}x+B_{1}y+C_{1}=0$ , and the second one is determined by the equation $A_{2}x+B_{2}y+C_{2}=0$ .

Write the program which finds the number of points in the intersection of two given sets.

输入格式

The first line of the input contains three integer numbers $A_{1},B_{1},C_{1}$ separated by space. The second line contains three integer numbers $A_{2},B_{2},C_{2}$ separated by space. All the numbers are between -100 and 100, inclusive.

输出格式

Print the number of points in the intersection or -1 if there are infinite number of points.

输入输出样例

输入#1
```
1 1 0
2 2 0
```
输出#1
```
-1
```
输入#2
```
1 1 0
2 -2 0
```
输出#2
```
1
```

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