Compilare: user.cpp: In function ‘void compress()’: user.cpp:68:12: warning: variable ‘tmp’ set but not used [-Wunused-but-set-variable] int last, tmp, mxn; ^ user.cpp: In function ‘void solve()’: user.cpp:116:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (st < mp[i - 1].size() && ivs[mp[i - 1][st]].y < ivs[j].x) ++st; ^ user.cpp:117:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (dr < mp[i - 1].size() && ivs[mp[i - 1][dr]].x <= ivs[j].y) ++dr; ^