Compilare: user.cpp: In function ‘void Query(TrieNode*, int, int, int, int, int)’: user.cpp:38:29: warning: suggest parentheses around comparison in operand of ‘^’ [-Wparentheses] if(str^CurrentString>Ans) ^ user.cpp:44:35: warning: suggest parentheses around comparison in operand of ‘^’ [-Wparentheses] else if(str^CurrentString == Ans && stop == Pos) ^ user.cpp:51:52: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] bool Next = str&(1<<(length-CurrentPosition-1))>0; ^ user.cpp: In function ‘int main()’: user.cpp:68:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("xormax.in", "r", stdin); ^ user.cpp:69:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("xormax.out", "w", stdout); ^ user.cpp:72:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:78:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^