Compilare: user.cpp: In function ‘void preprocesare()’: user.cpp:57:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=3, carry = 1; i<=2*E.size()+10; ++i, ++carry) { ^ user.cpp:66:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<E.size(); ++i) ^ user.cpp:69:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<E.size(); ++i) ^ user.cpp: In function ‘void Euler(int, int)’: user.cpp:80:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[node].size(); ++i) { ^ user.cpp: In function ‘int main()’: user.cpp:26:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a, &b); ^ user.cpp: In function ‘void read()’: user.cpp:87:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lca.in", "rt", stdin); ^ user.cpp:88:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lca.out", "wt", stdout); ^ user.cpp:89:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &M); ^ user.cpp:96:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &b); ^