Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:23:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<GN[nod].size(); ++i) ^ user.cpp: In function ‘int rezolvaCiclu(int, int)’: user.cpp:42:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<GN[b].size(); ++j) ^ user.cpp:54:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<G[a].size(); ++j) ^ user.cpp:65:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<G[b].size(); ++j) ^ user.cpp:76:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<G[a].size(); ++j) ^ user.cpp: In function ‘int main()’: user.cpp:103:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biperm.in", "rt", stdin); ^ user.cpp:104:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biperm.out", "wt", stdout); ^ user.cpp:105:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp:113:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp:118:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^