Compilare: main.cpp: In function 'node* getnew()': main.cpp:33:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<node*>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | if(puse==used.size()) | ~~~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:211:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 211 | for(int i=0;i<poz[x].size();i++) | ~^~~~~~~~~~~~~~ main.cpp:220:20: warning: unused variable 'cnt' [-Wunused-variable] 220 | ll cnt=p-prv; | ^~~ main.cpp:227:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 227 | for(int i=0;i<poz[x].size();i++) | ~^~~~~~~~~~~~~~ main.cpp:248:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 248 | for(int i=0;i<poz[x].size();i++) | ~^~~~~~~~~~~~~~ main.cpp:253:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 253 | if(i+1<poz[x].size()) | ~~~^~~~~~~~~~~~~~ main.cpp:259:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 259 | for(int i=0;i<poz[x].size();i++) | ~^~~~~~~~~~~~~~