Compilare: main.cpp: In function 'int main()': main.cpp:55:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (fata[i].size() == n - 1) ~~~~~~~~~~~~~~~^~~~~~~~ main.cpp:58:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (spate[i].size() == n - 1) ~~~~~~~~~~~~~~~~^~~~~~~~ main.cpp:80:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < N && k < expo.size(); ++i) { ~~^~~~~~~~~~~~~ main.cpp:75:33: warning: 'en' may be used uninitialized in this function [-Wmaybe-uninitialized] if (s[i] + 1 == s[en]) ~~~~^ main.cpp:63:20: warning: 'unu' may be used uninitialized in this function [-Wmaybe-uninitialized] calcs(unu); ^