Compilare: user.cpp: In function ‘bool BFS()’: user.cpp:42:41: 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:61:37: 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:74:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[node].size(); i ++) ^ user.cpp:85:21: warning: unused variable ‘primu’ [-Wunused-variable] int primu = min(L[node][i], node); ^ user.cpp:86:21: warning: unused variable ‘doilea’ [-Wunused-variable] int doilea = max(L[node][i], node); ^ user.cpp:76:13: warning: unused variable ‘xx’ [-Wunused-variable] int xx = L[node][i]; ^ user.cpp: In function ‘int main()’: user.cpp:115:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[destination].size(); i ++) ^ user.cpp:147:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ans.size(); i ++) ^ user.cpp:154:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < solution.size(); i ++) ^