Compilare: user.cpp: In function ‘void DF(int, int)’: user.cpp:82:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[nod].size(); i++) { ^ user.cpp:81:7: warning: unused variable ‘cnt’ [-Wunused-variable] int cnt = 0; ^ user.cpp: In function ‘void compute(int)’: user.cpp:101:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < ret[nod].size(); i++) { ^ user.cpp:106:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[nod].size(); i++) { ^ user.cpp:93:7: warning: unused variable ‘x’ [-Wunused-variable] int x = intv[nod].first, y = intv[nod].second; ^ user.cpp:93:28: warning: unused variable ‘y’ [-Wunused-variable] int x = intv[nod].first, y = intv[nod].second; ^ user.cpp: In function ‘int main()’: user.cpp:156:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < Q.size(); i++) { ^