Compilare: main.cpp: In function 'void dij(int)': main.cpp:53:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:70:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d",&t,&n,&m); ^ main.cpp:72:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&dragon[i]); ^ main.cpp:75:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d",&i,&j,&c); ^