Compilare: user.cpp: In function ‘int get_id(int, int)’: user.cpp:9:14: warning: suggest parentheses around arithmetic in operand of ‘|’ [-Wparentheses] return l + r | l != r; ~~^~~ user.cpp: In function ‘void build(int, int)’: user.cpp:18:19: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int m = l + r >> 1; ~~^~~ user.cpp: In function ‘void update(int, int, int, int)’: user.cpp:31:19: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int m = l + r >> 1; ~~^~~ user.cpp: In function ‘int eval(int, int, int, int)’: user.cpp:47:19: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int m = l + r >> 1; ~~^~~ user.cpp: In function ‘int main()’: user.cpp:62:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbint.in", "r", stdin); ^ user.cpp:63:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbint.out", "w", stdout); ^ user.cpp:66:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &q); ^ user.cpp:68:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", a + i); ^ user.cpp:74:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &o, &a, &b); ^