Compilare: user.cpp: In function ‘void df(int, int)’: user.cpp:13:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[in].size(); i ++) { ^ user.cpp: In function ‘void df2(int, int)’: user.cpp:28:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[in].size(); i ++) { ^ user.cpp: In function ‘void df3(int)’: user.cpp:42:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[in].size(); i ++) { ^ user.cpp: In function ‘int main()’: user.cpp:68:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[poz].size(); i ++) { ^ user.cpp:78:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[poz].size(); i ++) { ^ user.cpp:86:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[act.second].size(); i ++) { ^ user.cpp:68:36: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(int i = 0; i < L[poz].size(); i ++) { ^