Compilare: main.cpp: In function 'int main()': main.cpp:24:36: warning: comparison of integer expressions of different signedness: 'std::map<int, int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 24 | for (i = 1; i <= n && f.size() < l; i++) | ~~~~~~~~~^~~ main.cpp:29:36: warning: comparison of integer expressions of different signedness: 'std::map<int, int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 29 | while (dr <= n && f.size() < u) | ~~~~~~~~~^~~ main.cpp:31:22: warning: comparison of integer expressions of different signedness: 'std::map<int, int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 31 | if (f.size() <= u && f.size() >= l) | ~~~~~~~~~^~~~ main.cpp:31:39: warning: comparison of integer expressions of different signedness: 'std::map<int, int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 31 | if (f.size() <= u && f.size() >= l) | ~~~~~~~~~^~~~