/in/foo.cc: In function 'void dij(int)':
/in/foo.cc:68:39: warning: narrowing conversion of 'd[v]' from 'long long int' to 'int' inside { } [-Wnarrowing]
      if(!vis[v]) q.push((point){v, d[v]}); 
                                    ~~~^
/in/foo.cc: In function 'int main()':
/in/foo.cc:95:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int l = 0; l < G[k].size(); l++)
                    ~~^~~~~~~~~~~~~