Compilare: user.cpp: In function ‘int caut(int)’: user.cpp:19:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < h[y].size(); ++i){ ^ user.cpp: In function ‘int main()’: user.cpp:42:5: warning: ‘n1’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i = 0; i < n1; ++i){ ^