You could directly download '.cpp' source files here.
Or, you could get them through these Luogu Paste link:
Dijkstra with Priority Queue: https://www.luogu.org/paste/tbs4n77x
Traditional Dijkstra: https://www.luogu.org/paste/2i2okows
Shortest Path Faster Algorithm (SPFA): https://www.luogu.org/paste/wmrznnep
Fast Read Function for 'double' type (including common header files): https://www.luogu.org/paste/ziatpz94
Fast 'gets()' Function for 'char[]' type: https://www.luogu.org/paste/65ywyb7d
Keeps updating...