Compilare: main.cpp: In function 'void check(int, int, int)': main.cpp:42:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for(int x = 0; x < vec[s[i+1]-'a'].size(); x++) | ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:69:12: warning: unused variable 'i' [-Wunused-variable] 69 | int T, i; | ^