Compilare: user.cpp: In function ‘int main()’: user.cpp:15:19: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[5001]’ [-Wformat=] scanf("%s", &x); ^ user.cpp:13:22: warning: unused variable ‘top’ [-Wunused-variable] char x[5001], c, top; ^ user.cpp:10:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("par.in","r", stdin); ^ user.cpp:11:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("par.out","w", stdout); ^ user.cpp:14:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:15:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", &x); ^