Compilare: main.cpp: In member function 'void trie::insert(std::string, long long int, long long int)': main.cpp:56:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | if (pos==word.size()) | ~~~^~~~~~~~~~~~~ main.cpp: In member function 'long long int trie::count(std::string, long long int)': main.cpp:86:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 86 | if (pos==word.size()) | ~~~^~~~~~~~~~~~~ main.cpp: In function 'void run_case()': main.cpp:106:24: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 106 | for (int j=0; j<x.size(); j++) | ~^~~~~~~~~ main.cpp:109:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 109 | for (int k=j; k<x.size(); k++) | ~^~~~~~~~~ main.cpp:121:24: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 121 | for (int j=0; j<x.size(); j++) | ~^~~~~~~~~ main.cpp:124:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 124 | for (int k=j; k<x.size(); k++) | ~^~~~~~~~~ main.cpp:133:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 133 | for (int i=0; i<na[1].size(); i++) | ~^~~~~~~~~~~~~ main.cpp:136:24: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 136 | for (int j=i; j<na[1].size(); j++) | ~^~~~~~~~~~~~~