Compilare: main.cpp: In function 'int main()': main.cpp:124:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < e.size();) ~~^~~~~~~~~~ main.cpp:174:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < stiva[st].size(); k++) ~~^~~~~~~~~~~~~~~~~~ main.cpp:176:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = st + 1; k < stiva.size(); k++) ~~^~~~~~~~~~~~~~ main.cpp:180:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int kkk = 0; kkk < aux.size(); kkk++) ~~~~^~~~~~~~~~~~ main.cpp:183:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (stiva.size() > j) ~~~~~~~~~~~~~^~~ main.cpp:197:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < stiva[0].size(); i++) ~~^~~~~~~~~~~~~~~~~ main.cpp:199:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < stiva.size(); i++) ~~^~~~~~~~~~~~~~ main.cpp:203:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < aux.size(); j++) ~~^~~~~~~~~~~~ main.cpp:207:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < ans.size(); i++) ~~^~~~~~~~~~~~