Compilare: main.cpp: In function 'void graf()': main.cpp:26:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int p=0;p < drum.size();p++) ~~^~~~~~~~~~~~~ main.cpp:30:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i < G[nod].size();i++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:45:56: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d %d",&n,&m,&nodstart,&nodfinal); ^ main.cpp:47:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&a,&b); ^