Compilare: main.cpp: In function 'int main()': main.cpp:74:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<sequence>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | for (int i = 0; i < freq.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:103:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<sequence>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 103 | for (int i = 0; i < freq.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:108:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<sequence>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 108 | for (int i = 0; i < freq.size(); i++) | ~~^~~~~~~~~~~~~