Compilare: user.cpp: In function ‘void solve(int, int)’: user.cpp:102:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i1 < interv[ p1 ].size () || i2 < interv[ p2 ].size()) { ^ user.cpp:102:64: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i1 < interv[ p1 ].size () || i2 < interv[ p2 ].size()) { ^ user.cpp:103:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i1 >= interv[ p1 ].size()) { ^ user.cpp:110:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i2 >= interv[ p2 ].size()) { ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:17:38: 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); ^