Compilare: user.cpp: In function ‘void solve()’: user.cpp:127:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos < ap[node].size() && ap[node][pos].first > tribe.first) continue; ^ user.cpp:129:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (pos < ap[node].size() && ap[node][pos].first < tribe.first) pos++; ^ user.cpp:131:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos == ap[node].size()) break; ^