Compilare: main.cpp: In function 'void dijkstra(int)': main.cpp:38:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graph[nod].size();++i) ~^~~~~~~~~~~~~~~~~~ main.cpp:30:9: warning: variable 'dist' set but not used [-Wunused-but-set-variable] int dist; ^~~~ main.cpp: In function 'int main()': main.cpp:53:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&n,&m); ^ main.cpp:57:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&x,&y,&z); ^