Compilare: user.cpp: In function ‘bool BFS()’: user.cpp:39:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[node].size(); i ++) ^ user.cpp: In function ‘void DFS1(const int&)’: user.cpp:58:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[node].size(); i ++) ^ user.cpp: In function ‘void DFS2(const int&)’: user.cpp:71:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[node].size(); i ++) ^ user.cpp:82:21: warning: unused variable ‘primu’ [-Wunused-variable] int primu = min(L[node][i], node); ^ user.cpp:83:21: warning: unused variable ‘doilea’ [-Wunused-variable] int doilea = max(L[node][i], node); ^ user.cpp:73:13: warning: unused variable ‘xx’ [-Wunused-variable] int xx = L[node][i]; ^ user.cpp: In function ‘int main()’: user.cpp:112:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[destination].size(); i ++) ^ user.cpp:144:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ans.size(); i ++) ^ user.cpp:151:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < solution.size(); i ++) ^