Compilare: main.cpp:4:19: warning: suggest parentheses around '-' inside '>>' [-Wparentheses] #define log(x) 31 - __builtin_clz(x) ~~~^~~~~~~~~~~~~~~~~~ main.cpp:8:7: note: in expansion of macro 'log' seg[log(N/(log(N) >> 1))+2][N], v[(N<<1)+1], size; ^~~ main.cpp:8:14: note: in expansion of macro 'log' seg[log(N/(log(N) >> 1))+2][N], v[(N<<1)+1], size; ^~~ main.cpp: In function 'int main()': main.cpp:4:19: warning: suggest parentheses around '-' inside '>>' [-Wparentheses] #define log(x) 31 - __builtin_clz(x) ~~~^~~~~~~~~~~~~~~~~~ main.cpp:63:7: note: in expansion of macro 'log' B = log(n) >> 1; ^~~ main.cpp:87:54: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] seg[i][j] = cmp(seg[i-1][j], seg[i-1][j + (1<<i-1)]); ~^~ main.cpp:58:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("lca.in", "r", stdin); ^ main.cpp:59:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("lca.out", "w", stdout); ^ main.cpp:62:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &q); ^ main.cpp:65:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &j); ^ main.cpp:91:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^