Compilare: user.cpp: In function ‘int main()’: user.cpp:54:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < edges[node].size(); ++i) { ^ user.cpp:58:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < edges[node].size(); ++i) { ^ user.cpp:68:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < edges[node].size(); ++i) { ^ user.cpp:74:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < edges[x].size(); ++j) { ^ user.cpp:84:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < answer.size(); ++i) { ^