Compilare: user.cpp: In function ‘Node getMin(int&, int&)’: user.cpp:40:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p_a >= a.size()) ^ user.cpp:42:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(p_b >= b.size()) ^ user.cpp: In function ‘int main()’: user.cpp:67:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0, j = 0; i < a.size() || j < b.size() - 1; ) { ^ user.cpp:67:58: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0, j = 0; i < a.size() || j < b.size() - 1; ) { ^