Compilare: user.cpp: In function ‘void Build()’: user.cpp:42:72: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] A[k][i][j] = Max( A[k - 1][i][j], A[k - 1][i + (1 << k - 1)][j], A[k - 1][i][j + (1 << k - 1)], A[k - 1][i + (1 << k - 1 )][j + (1 << k - 1)]); ^ user.cpp:42:106: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] A[k][i][j] = Max( A[k - 1][i][j], A[k - 1][i + (1 << k - 1)][j], A[k - 1][i][j + (1 << k - 1)], A[k - 1][i + (1 << k - 1 )][j + (1 << k - 1)]); ^ user.cpp:42:134: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] A[k][i][j] = Max( A[k - 1][i][j], A[k - 1][i + (1 << k - 1)][j], A[k - 1][i][j + (1 << k - 1)], A[k - 1][i + (1 << k - 1 )][j + (1 << k - 1)]); ^ user.cpp:42:153: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] A[k][i][j] = Max( A[k - 1][i][j], A[k - 1][i + (1 << k - 1)][j], A[k - 1][i][j + (1 << k - 1)], A[k - 1][i + (1 << k - 1 )][j + (1 << k - 1)]); ^ user.cpp: In function ‘void Read()’: user.cpp:12:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &M); ^ user.cpp:15:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &A[0][i][j] ); ^ user.cpp: In function ‘void Solve()’: user.cpp:57:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &k); ^