Compilare: user.cpp: In function ‘int main()’: user.cpp:84:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<m[*it].size();j++) ok[ m[*it][j] ]=1; ^ user.cpp:97:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<m[nod].size();j++) ^ user.cpp:58:9: warning: unused variable ‘tribcrt’ [-Wunused-variable] int tribcrt,nod; ^ user.cpp: In function ‘char get(FILE*)’: user.cpp:27:33: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, BUFF_SIZE, f); ^