Compilare: main.cpp: In function 'void dfs(int)': main.cpp:16:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0; i < ngb[nod].size(); i++ ) { ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfsRev(int)': main.cpp:29:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0; i < ngbRev[nod].size(); i++ ) { ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:69:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( j = 0; j < comp[i].size(); j++ ) ~~^~~~~~~~~~~~~~~~ main.cpp:40:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &n, &m ); ^ main.cpp:42:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &a, &b ); ^