Compilare: main.cpp: In function 'bool cmp(int, int)': main.cpp:15:23: warning: self-comparison always evaluates to true [-Wtautological-compare] return p[i].first == p[i].first && p[i].second < p[i].second; ~~~~~~~~~~~^~~~~~~~~~~~~ main.cpp:15:52: warning: self-comparison always evaluates to false [-Wtautological-compare] return p[i].first == p[i].first && p[i].second < p[i].second; ~~~~~~~~~~~~^~~~~~~~~~~~~