Compilare: user.cpp: In function ‘int hashexist(int, int)’: user.cpp:28:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<v[t1].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:39:18: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[10000005]’ [-Wformat=] scanf("%s",&s); ^ user.cpp:42:25: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[22]’ [-Wformat=] while (scanf("%s",&a)==1) { ^ user.cpp:35:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp:36:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("abc2.in","r",stdin); ^ user.cpp:37:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("abc2.out","w",stdout); ^ user.cpp:39:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&s); ^