Compilare: user.cpp: In function ‘void add(long long int)’: user.cpp:41:33: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if((x >> j) & 1 > 0) { ~~^~~ user.cpp: In function ‘void addnt(long long int)’: user.cpp:53:33: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if((x >> j) & 1 > 0) { ~~^~~ user.cpp: In function ‘int bfs(long long int, long long int)’: user.cpp:71:28: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if((from >> i) & 1 > 0) { ~~^~~ user.cpp: In function ‘long long int i64()’: user.cpp:21:33: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,LEN,in); ^ user.cpp:31:33: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,LEN,in); ^