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:209:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 209 | for(int i=0;i<poz[x].size();i++) | ~^~~~~~~~~~~~~~ main.cpp:218:20: warning: unused variable 'cnt' [-Wunused-variable] 218 | ll cnt=p-prv; | ^~~ main.cpp:225:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 225 | for(int i=0;i<poz[x].size();i++) | ~^~~~~~~~~~~~~~ main.cpp:246:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 246 | for(int i=0;i<poz[x].size();i++) | ~^~~~~~~~~~~~~~ main.cpp:251:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 251 | if(i+1<poz[x].size()) | ~~~^~~~~~~~~~~~~~ main.cpp:257:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 257 | for(int i=0;i<poz[x].size();i++) | ~^~~~~~~~~~~~~~