Compilare: user.cpp: In function ‘void make_rmq(int, int)’: user.cpp:17:70: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] rq[lg][i][j] = gcd(rq[lg][i][j], rq[lg-1][max(1, i-(1<<lg-1))][max(1, j-(1<<lg-1))]); ^ user.cpp:2:31: note: in definition of macro ‘gcd’ #define gcd(x, y) __gcd((x), (y)) ^ user.cpp:17:91: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] rq[lg][i][j] = gcd(rq[lg][i][j], rq[lg-1][max(1, i-(1<<lg-1))][max(1, j-(1<<lg-1))]); ^ user.cpp:2:31: note: in definition of macro ‘gcd’ #define gcd(x, y) __gcd((x), (y)) ^ user.cpp:18:70: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] rq[lg][i][j] = gcd(rq[lg][i][j], rq[lg-1][max(1, i-(1<<lg-1))][j]); ^ user.cpp:2:31: note: in definition of macro ‘gcd’ #define gcd(x, y) __gcd((x), (y)) ^ user.cpp:19:73: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] rq[lg][i][j] = gcd(rq[lg][i][j], rq[lg-1][i][max(1, j-(1<<lg-1))]); ^ user.cpp:2:31: note: in definition of macro ‘gcd’ #define gcd(x, y) __gcd((x), (y)) ^ user.cpp: In function ‘int main()’: user.cpp:36:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("xcmmdc.in", "r", stdin); ^ user.cpp:37:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("xcmmdc.out", "w", stdout); ^ user.cpp:40:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&n,&m,&g,&q); ^ user.cpp:43:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&rq[0][i][j]); ^ user.cpp:69:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^