Compilare: main.cpp: In function 'bool checker(int)': main.cpp:10:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 10 | if (pos + k - 1 > mt[t[0]].size() - 1) { | ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:14:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for (int i = 1; i < t.size(); ++i) { | ~~^~~~~~~~~~ main.cpp:16:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | if (pos + k - 1 > mt[t[i]].size() - 1) { | ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:28:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for (int i = 0; i < s.size(); ++i) { | ~~^~~~~~~~~~