Compilare: user.cpp: In function ‘void df(int, int, int, int)’: user.cpp:21:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < A[x].size(); i++ ) { ^ user.cpp: In function ‘int main()’: user.cpp:64:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < teams.size(); i++ ) { ^ user.cpp:69:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < vulnerable.size(); i++ ) { ^