Compilare: user.cpp: In function ‘int main()’: user.cpp:56:24: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[500001]’ [-Wformat=] scanf("%s", &s1); ^ user.cpp:57:24: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[500001]’ [-Wformat=] scanf("%s", &s2); ^ user.cpp:53:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:56:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", &s1); ^ user.cpp:57:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", &s2); ^