CSES - Shortest Routes I
  • Time limit: 1.00 s
  • Memory limit: 512 MB

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.


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.


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


  • 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



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


0 5 2