Compilare: user.cpp: In function ‘void solve()’: user.cpp:70:52: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] res = Gcd(res, gcd[i][j + (1 << lg - 1)][lg - 1]); ^ user.cpp:71:49: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] res = Gcd(res, gcd[i + (1 << lg - 1)][j][lg - 1]); ^ user.cpp:72:49: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] res = Gcd(res, gcd[i + (1 << lg - 1)][j + (1 << lg - 1)][lg - 1]); ^ user.cpp:72:68: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] res = Gcd(res, gcd[i + (1 << lg - 1)][j + (1 << lg - 1)][lg - 1]); ^ user.cpp: In function ‘void queries()’: user.cpp:93:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &L); ^ user.cpp: In function ‘int main()’: user.cpp:100:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &n, &m, &k, &q); ^ user.cpp:103:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int x; scanf("%d", &x); ^