Compilare: user.cpp: In function ‘void point(int, int, int&, std::pair<long long int, long long int>)’: user.cpp:56:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nr[k].size();i++) ^ user.cpp: In function ‘void print(int, int, int, std::pair<long long int, long long int>)’: user.cpp:88:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=ind+dir,contor=1;contor!=nr[k].size();i+=dir,contor++) ^ user.cpp:92:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i>=nr[k].size()) ^ user.cpp: In function ‘void solve()’: user.cpp:116:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2;i<=v.size()-1;i++) ^ user.cpp:123:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=3;i<=v.size()-1;i++) ^ user.cpp:133:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=v.size()-1;i++) ^ user.cpp: In function ‘int main()’: user.cpp:146:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nr[K_init].size();i++) ^