Compilare: user.cpp: In function ‘bool Test(std::vector<int>&, int)’: user.cpp:63:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos != conf.size()) ok &= conf[pos] != 0; ^ user.cpp: In function ‘void make_graph()’: user.cpp:71:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < States.size(); i++) { ^ user.cpp:74:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j <= actState.size();j++) { ^ user.cpp:83:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int vv = 0; vv < now.size(); vv++) ^ user.cpp: In function ‘int main()’: user.cpp:109:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (expected != States.size()) cerr << "Error : " << States.size() << "/" << expected; ^ user.cpp:114:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < States.size(); i++) { ^ user.cpp:115:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (States[i].size() != k) ^ user.cpp:124:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < States.size(); i++) { ^ user.cpp:135:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < States.size(); i++) { ^ user.cpp:95:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cabane.in","r",stdin); ^ user.cpp:96:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cabane.out","w",stdout); ^ user.cpp:98:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^