Compilare: user.cpp: In function ‘int Nextint()’: user.cpp:26:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (;i < strlen(S);i++) ^ user.cpp: In function ‘int main()’: user.cpp:68:34: warning: operation on ‘K’ may be undefined [-Wsequence-point] S[++K] = G[S[K-1]][0]; ^ user.cpp:79:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0;i <Sol.size();i++) ^ user.cpp: In function ‘int Nextint()’: user.cpp:21:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",S); ^ user.cpp: In function ‘int main()’: user.cpp:37:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ciclueuler.in","r",stdin); ^ user.cpp:38:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ciclueuler.out","w",stdout); ^