Compilare: user.cpp: In function ‘std::pair<int, int> intersect(int, int)’: user.cpp:34:37: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(abs(v[i].first+v[i].second)&1!=abs(o[j].first-o[j].second)&1) ^ user.cpp: In function ‘void Read(int&)’: user.cpp:23:37: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] pos=0,fread(fl,1,MAX,IN); ^ user.cpp:29:37: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] pos=0,fread(fl,1,MAX,IN); ^ user.cpp: In function ‘int main()’: user.cpp:75:23: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(fl,1,MAX,IN); ^