6752.Shortest Routes I

Time Limit: 1s Memory Limit: 512MB

There are $n$ cities and $m$ flight connections between them. Your task is to determine the length of the shortest route from Syrjälä to every city.

Input Format(From the terminal/stdin)

The first input line has two integers $n$ and $m$ : the number of cities and flight connections. The cities are numbered $1,2,\dots,n$ , and city $1$ is Syrjälä.

After that, there are $m$ lines describing the flight connections. Each line has three integers $a$ , $b$ and $c$ : a flight begins at city $a$ , ends at city $b$ , and its length is $c$ . Each flight is a one-way flight.

You can assume that it is possible to travel from Syrjälä to all other cities.

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

Output Format(To the terminal/stdout)

Print $n$ integers: the shortest route lengths from Syrjälä to cities $1,2,\dots,n$ .

Sample Input

Copy
3 4
1 2 6
1 3 2
3 2 3
1 3 4
 · \n
 · · \n
 · · \n
 · · \n
 · · \n

Sample Output

Copy
0 5 2
 · · \n
Source: CSES, Graph Algorithms, 1671

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