Compilare: main.cpp: In function 'void verify(int, int)': main.cpp:16:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < s[p].size(); j++) ~~^~~~~~~~~~~~~ main.cpp:17:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < s[k].size() && s[k][i] == s[p][j]) ~~^~~~~~~~~~~~~ main.cpp:19:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i == s[k].size()) ~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:35:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (s[i].size() > max_size) ~~~~~~~~~~~~^~~~~~~~~~ main.cpp:40:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (s[i].size() == max_size) ~~~~~~~~~~~~^~~~~~~~~~~