Compilare: main.cpp: In function 'void dfsw(int)': main.cpp:12:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<w[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int)': main.cpp:21:9: warning: unused variable 'i' [-Wunused-variable] int i,j,vecin; ^ main.cpp: In function 'void dfs_marc(int, int)': main.cpp:44:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<vinv[nod].size();i++){ ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:58:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ main.cpp:60:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&x); ^