COCI '17 Contest 4 #6 Ceste
View as PDFThere's a country with  cities and 
 bidirectional roads. Driving on road 
 takes 
 minutes,
and costs 
 kunas (Croatian currency).
To make the arrival to the holiday destination as pleasant as possible, you want to make it
as fast and as cheap as possible. More specifically, you are in city  and want to minimize
the product of total money spent and total time spent (overall, with all roads you drove on) in
getting to a city from city 
. For each city (except city 
), output the required minimal product
or 
 if city 
 and that city aren't connected.
Input Specification
The first line of input contains numbers  
, the number of cities, and 
 
,
the number of roads.
Each of the following  lines contains four numbers, 
 
that denote there is a road connecting cities 
 and 
, that it takes 
 minutes to drive
on it, and it costs 
 kunas.
It is possible that multiple roads exist between two cities, but there will never be a road that
connects a city with itself.
Output Specification
You must output  lines. In the 
 line, output the required minimal product in order to get
to city 
, or 
 if cities 
 and 
 aren't connected.
Scoring
In test cases worth  of total points, it will hold 
.
Sample Input 1
4 4
1 2 2 4
3 4 4 1
4 2 1 1
1 3 3 1
Sample Output 1
8
3
14
Sample Input 2
4 5
1 2 1 7
3 1 3 2
2 4 5 2
2 3 1 1
2 4 7 1
Sample Output 2
7
6
44
Explanation for Sample Output 2
In order to get to city , you need to drive on road 
, for that it takes 
 minute and 
 kunas, so the
required product is 
.
In order to get to city , you need to drive on road 
, for that it takes 
 minutes and 
 kunas, so the
required product is 
.
In order to get to city , you need to drive on roads 
 in that order, and for that it takes a total of
 minutes and 
 kunas, so the required product is 
.
Sample Input 3
3 2
1 2 2 5
2 1 3 3
Sample Output 3
9
-1
Comments
Since the original data were weak, an additional test case was added, and all submissions were rejudged.