Compilare: main.cpp: In function 'int main()': main.cpp:22:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::unordered_map<long long int, long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(i=1;i<=H.size();i++) | ~^~~~~~~~~~ main.cpp:10:19: warning: unused variable 'tmax' [-Wunused-variable] 10 | int i,j,x,b,t,tmax=0; | ^~~~