Compilare: user.cpp: In function ‘void Add_To_Hash(int, int, int&)’: user.cpp:21:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<h[x1].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:72:28: warning: format ‘%s’ expects argument of type ‘char*’, but argument 4 has type ‘char (*)[16400]’ [-Wformat=] scanf("%d%d %s",&N,&X,&str); ^ user.cpp:69:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("substr.in","r",stdin); ^ user.cpp:70:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("substr.out","w",stdout); ^ user.cpp:72:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d %s",&N,&X,&str); ^