Compilare: main.cpp: In function 'void DFS(int, int, int&, std::vector<bool>&, std::vector<char>&)': main.cpp:19:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (auto i = 0; i < A[a].size(); i++) ~~^~~~~~~~~~~~~ main.cpp:21:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (auto j = 0; j < A[b].size(); j++) ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:55:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (auto j = 0; j < A[i].size() - 1; j++) ~~^~~~~~~~~~~~~~~~~ main.cpp:56:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (auto w = j + 1; w < A[i].size(); w++) ~~^~~~~~~~~~~~~ main.cpp:64:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (auto j = 0; j < A[i].size(); j++) ~~^~~~~~~~~~~~~