Compilare: main.cpp: In function 'bool esteSubsir(int, int)': main.cpp:31:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (indexA < S[a].size() && indexB < S[b].size()) ~~~~~~~^~~~~~~~~~~~~ main.cpp:31:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (indexA < S[a].size() && indexB < S[b].size()) ~~~~~~~^~~~~~~~~~~~~ main.cpp:40:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] return indexA == S[a].size(); ~~~~~~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:98:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sol.size(); i++) ~~^~~~~~~~~~~~