Compilare: main.cpp: In function 'void solve()': main.cpp:17:17: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[1000002]' [-Wformat=] scanf("%s", &ss); ^ main.cpp:17:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", &ss); ^ main.cpp: In function 'int main()': main.cpp:53:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("prefix.in", "r", stdin); ^ main.cpp:54:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("prefix.out", "w", stdout); ^ main.cpp:57:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ main.cpp: In function 'void solve()': main.cpp:18:17: warning: array subscript is below array bounds [-Warray-bounds] char* s = ss - 1; ^ main.cpp:18:17: warning: array subscript is below array bounds [-Warray-bounds] main.cpp:18:17: warning: array subscript is below array bounds [-Warray-bounds]