Compilare: user.cpp: In function ‘int power(int)’: user.cpp:5:20: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] return (2 << x - 1); ~~^~~ user.cpp: In function ‘int zParcurgere(int, int, int)’: user.cpp:11:29: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] int length = (1 << pasi - 1), n = power(length); ~~~~~^~~ user.cpp:20:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:23:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("z.in", "r", stdin); ^ user.cpp:24:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("z.out", "w", stdout); ^ user.cpp:27:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ user.cpp:31:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^