Compilare: main.cpp: In function 'void up(Trie*)': main.cpp:46:14: warning: left operand of comma operator has no effect [-Wunused-value] z=(z,x); ^ main.cpp: In function 'int main()': main.cpp:146:24: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[1000004]' [-Wformat=] scanf ("%s", &s); ^ main.cpp:138:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("rps.in","r",stdin); ^ main.cpp:139:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("rps.out","w",stdout); ^ main.cpp:140:44: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d %d %d\n", &n, &k, &w, &d); ^ main.cpp:146:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%s", &s); ^