Compilare: user.cpp: In function ‘void batchup()’: user.cpp:33:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < pts.size(); ++i) { ^ user.cpp:38:42: warning: narrowing conversion of ‘c’ from ‘i64 {aka long long int}’ to ‘int’ inside { } [-Wnarrowing] bat.emplace_back( PTX {c, INF} , pts[i] ); ^ user.cpp: In function ‘int main()’: user.cpp:57:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos + msk < bat.size() && bat[pos + msk].first.x <= x) ^