Compilare: main.cpp: In function 'bool subsir(int, int)': main.cpp:17:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (p1 < v[i].size()) ~~~^~~~~~~~~~~~~ main.cpp:19:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (p2 < v[j].size() && v[j][p2] != v[i][p1]) ++p2; ~~~^~~~~~~~~~~~~ main.cpp:20:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (p2 == v[j].size()) ~~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:39:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[i].size() > l) ~~~~~~~~~~~~^~~ main.cpp:44:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (v[i].size() == l) ~~~~~~~~~~~~^~~~