Compilare: user.cpp: In function ‘void dfsp(int)’: user.cpp:13:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( j = 0; j < G[nod].size(); j++ ) ~~^~~~~~~~~~~~~~~ user.cpp: In function ‘void dfsm(int)’: user.cpp:23:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( j = 0; j < GT[nod].size(); j++ ) ~~^~~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:53:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( j = 0; j < afis[i].size(); j++ ) ~~^~~~~~~~~~~~~~~~ user.cpp:32:32: 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:34:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &i, &j ); ^