Compilare: user.cpp: In function ‘int main()’: user.cpp:115:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<ccl.size();i++) ^ user.cpp: In function ‘void dfs(int)’: user.cpp:157:9: warning: unused variable ‘vec’ [-Wunused-variable] int vec=0; ^ user.cpp: In function ‘int main()’: user.cpp:32:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d",&v,&N,&M); ^ user.cpp:34:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&xstart,&ystart); ^ user.cpp:36:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&K); ^ user.cpp:40:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d",&x,&y,&r); ^ user.cpp:59:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&G); ^ user.cpp:63:47: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d%d",&x1,&y1,&x2,&y2); ^