Compilare: user.cpp: In function ‘void Solve()’: user.cpp:28:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] sol = max( RMQ[i][j][ lg[k] ], RMQ[i + k - (1<<lg[k])][j + k - (1<<lg[k])][ lg[k] ] ); ^ user.cpp:28:91: warning: array subscript has type ‘char’ [-Wchar-subscripts] sol = max( RMQ[i][j][ lg[k] ], RMQ[i + k - (1<<lg[k])][j + k - (1<<lg[k])][ lg[k] ] ); ^ user.cpp:29:59: warning: array subscript has type ‘char’ [-Wchar-subscripts] sol = max( sol, RMQ[i][j + k - (1<<lg[k])][ lg[k] ] ); ^ user.cpp:30:59: warning: array subscript has type ‘char’ [-Wchar-subscripts] sol = max( sol, RMQ[i + k - (1<<lg[k])][j][ lg[k] ] ); ^ user.cpp:27:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &i, &j, &k); ^ user.cpp: In function ‘void Read()’: user.cpp:46:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plantatie.in", "rt", stdin); ^ user.cpp:47:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plantatie.out", "wt", stdout); ^ user.cpp:48:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &M); ^ user.cpp:51:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &RMQ[i][j][0]); ^