Compilare: user.cpp: In function ‘int main()’: user.cpp:9:19: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[5000010]’ [-Wformat=] scanf("%s",&st); ^ user.cpp:7:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subbit.in","r",stdin); ^ user.cpp:9:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&st); ^