Compilare: main.cpp: In function 'void build_rmq()': main.cpp:31:15: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 31 | for(int i=0;i<len;i++){ | ~^~~~ main.cpp:35:20: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 35 | for(int k=1;(1<<k)<=len;k++){ | ~~~~~~^~~~~ main.cpp:38:16: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare] 38 | for(int j=0;j<=len-now;j++){ | ~^~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:89:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 89 | for(int i=0;i<euler.size();i++){ | ~^~~~~~~~~~~~~