Compilare: main.cpp: In function 'int main()': main.cpp:12:23: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[250004]' [-Wformat=] scanf ("%s" ,&a[1]); ^ main.cpp:13:23: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[250004]' [-Wformat=] scanf ("%s", &a[2]); ^ main.cpp:9:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("grea.in","r",stdin); ^ main.cpp:10:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("grea.out","w",stdout); ^ main.cpp:11:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d\n", &n, &k); ^ main.cpp:12:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%s" ,&a[1]); ^ main.cpp:13:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%s", &a[2]); ^