Compilare: main.cpp: In function 'int main()': main.cpp:28:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | while (ind < s.size()) { | ~~~~^~~~~~~~~~ main.cpp:36:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | while (ind < s.size() && isdigit(s[ind])) { | ~~~~^~~~~~~~~~ main.cpp:41:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | if (ind < s.size() && (s[ind] == 'x' || s[ind] == 'y' || s[ind] == 'z' || s[ind] == 't')) { | ~~~~^~~~~~~~~~ main.cpp:64:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation] 64 | for (int i = a; i <= b; i++) | ^~~ main.cpp:67:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for' 67 | mp.clear(); | ^~