Compilare: user.cpp: In function ‘int main()’: user.cpp:38:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<v.size();i++) ^ user.cpp:43:20: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(i>2 && (v[i].first==v[i-2].first && mod(v[i].second-v[i-2].second)==1) || (v[i].second==v[i-2].second && mod(v[i].first-v[i-2].first)==1)) ^ user.cpp:50:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(h.size()>k) ^ user.cpp:62:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(h.size()>k) ^