Compilare: main.cpp: In function 'int main()': main.cpp:20:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for(int i=0;i<hashh[clasa].size();i++) | ~^~~~~~~~~~~~~~~~~~~~ main.cpp:36:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int i=0;i<hashh[clasa].size();i++) | ~^~~~~~~~~~~~~~~~~~~~ main.cpp:51:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for(int i=0;i<hashh[clasa].size();i++) | ~^~~~~~~~~~~~~~~~~~~~ main.cpp:10:14: warning: unused variable 'i' [-Wunused-variable] 10 | int j,nr,i,ok,clasa,k=10,x,y; | ^