Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:71:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<lista[x].size(); i++) ^ user.cpp: In function ‘void afisare()’: user.cpp:146:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<sol[i].size(); j++) ^ user.cpp: In function ‘void citire()’: user.cpp:53:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &n, &m); ^ user.cpp:56:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &a, &b); ^