CSES - Flight Routes

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Gửi bài giải

Điểm: 1,00 (OI)
Giới hạn thời gian: 1.0s
Giới hạn bộ nhớ: 512M
Input: stdin
Output: stdout

Nguồn bài:
https://cses.fi/problemset/task/1196
Dạng bài
Ngôn ngữ cho phép
C, C++, Java, Kotlin, Pascal, PyPy, Python, Scratch

Your task is to find the ~k~ shortest flight routes from Syrjälä to Metsälä. A route can visit the same city several times.

Note that there can be several routes with the same price and each of them should be considered (see the example).

Input

  • The first input line has three integers ~n~, ~m~, and ~k~: the number of cities, the number of flights, and the parameter ~k~. The cities are numbered ~1,2,\ldots,n~. City 1 is Syrjälä, and city ~n~ is Metsälä.

After this, the input has ~m~ lines describing the flights. Each line has three integers ~a~, ~b~, and ~c~: a flight begins at city ~a~, ends at city ~b~, and its price is ~c~. All flights are one-way flights.

You may assume that there are at least ~k~ distinct routes from Syrjälä to Metsälä.

Output

  • Print ~k~ integers: the prices of the ~k~ cheapest routes sorted according to their prices.

Constraints

  • ~2 \le n \le 10^5~
  • ~1 \le m \le 2 \cdot 10^5~
  • ~1 \le a,b \le n~
  • ~1 \le c \le 10^9~
  • ~1 \le k \le 10~

Example Input

4 6 3
1 2 1
1 3 3
2 3 2
2 4 6
3 2 8
3 4 1

Example Output

4 4 7

Explanation: The cheapest routes are ~1 \rightarrow 3 \rightarrow 4~ (price ~4~), ~1 \rightarrow 2 \rightarrow 3 \rightarrow 4~ (price ~4~) and ~1 \rightarrow 2 \rightarrow 4~ (price ~7~).


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