I am not able to understand when -1 is to be printed and explain me the below mentioned code from line 62 onwards

#1
#2

hello @Vipul.kapoor
image

a) i==src it means we are on the source node and as per question they asked us to skip its distance thats why we are using continue.

b) dist.count will return 0 or 1.
1 if i is present in map
0 if i is not present in map.
0 here indicates that the node i is not reachable from the source hence we need to print -1 in that case. and that what we are doing here

c) for other cases dist[i]*6

#3

sir could you elaborate find() function
rest all is clear

#4

The map::find() is a built-in function in C++ STL which returns an iterator or a constant iterator that refers to the position where the key is present in the map. If the key is not present in the map container, it returns an iterator or a constant iterator which refers to map.end() .
for more details refer this ->article

#5

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