Compilare: main.cpp: In function 'bool ok(std::vector<int>&, int)': main.cpp:14:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | if (poz > s[idx].size()) | ~~~~^~~~~~~~~~~~~~~ main.cpp:16:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for (int i = 1; i < v.size(); ++i) | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:31:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for (int j = 1; j < s[i].size(); ++j) | ~~^~~~~~~~~~~~~ main.cpp:43:28: warning: unused variable 'm' [-Wunused-variable] 43 | int st = 1, dr = 2000, m; | ^