Compilare: main.cpp: In function 'int main()': main.cpp:118:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<L[v[i]].size();j++){ ~^~~~~~~~~~~~~~~ main.cpp:122:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int t=0;t<L[v[i+1]].size();t++){ ~^~~~~~~~~~~~~~~~~ main.cpp:149:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<L[v[st]].size();i++){ ~^~~~~~~~~~~~~~~~ main.cpp:156:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<L[v[poz]].size();j++){ ~^~~~~~~~~~~~~~~~~ main.cpp:170:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<L[v[st+1]].size();i++) ~^~~~~~~~~~~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:23:29: 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, 4096, fin); ^