Can you tell me my mistake?

Check i have edited your code ->


also it’s not printing right answer for dij call cause of your dij function.
Implement it like this

void dijkstra(T src)
{
    unordered_map<T, int> dist;

    //set all the distances to infinity
    for(auto l:mp)
    {
        dist[l.first]=INT_MAX;
    }

    set<pair<int ,T> > s;
    dist[src]=0;

    s.insert(make_pair(0,src));

    while(!s.empty())
    {
        //find the pair at the front.

        auto p=*(s.begin());

        T node=p.second;
        int nodeDist=p.first;
        //begin wale ka fix karr diya hamne ab isko erase kr do or iske neighbours ko insert kar do

        s.erase(s.begin());
        //Iterate over the neighbours of  the current node

        for(auto childpair:mp[node])
        {
            if(nodeDist + childpair.second < dist[childpair.first])
            {
                //int the set , updation of a particular is not possible
                //we have to remove the old pair, and insert the new pair to simulation pudation

                T dest = childpair.first;
                auto f = s.find(make_pair(dist[dest],dest));

                if(f!=s.end())
                {
                    s.erase(f);
                }

                dist[dest]=nodeDist + childpair.second;
                s.insert(make_pair(dist[dest],dest));
            }
        } 

    }
    for(auto d:dist)
    {
        cout<<d.first<<" is located at a distance of "<<d.second<<" from "<<src<<"\n";
    }

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