Compilare: user.cpp: In function ‘int rez(int, int, int, int)’: user.cpp:52:41: warning: array subscript has type ‘char’ [-Wchar-subscripts] return max(max(a[x1][y1][lg[x2-x1+1]][lg[y2-y1+1]], a[x2-(1<<lg[x2-x1+1])+1][y1][lg[x2-x1+1]][lg[y2-y1+1]]),max(a[x1][y2-(1<<lg[y2-y1+1])+1][lg[x2-x1+1]][lg[y2-y1+1]], a[x2-(1<<lg[x2-x1+1])+1][y2-(1<<lg[y2-y1+1])+1][lg[x2-x1+1]][lg[y2-y1+1]])); ^ user.cpp:52:54: warning: array subscript has type ‘char’ [-Wchar-subscripts] return max(max(a[x1][y1][lg[x2-x1+1]][lg[y2-y1+1]], a[x2-(1<<lg[x2-x1+1])+1][y1][lg[x2-x1+1]][lg[y2-y1+1]]),max(a[x1][y2-(1<<lg[y2-y1+1])+1][lg[x2-x1+1]][lg[y2-y1+1]], a[x2-(1<<lg[x2-x1+1])+1][y2-(1<<lg[y2-y1+1])+1][lg[x2-x1+1]][lg[y2-y1+1]])); ^ user.cpp:52:97: warning: array subscript has type ‘char’ [-Wchar-subscripts] return max(max(a[x1][y1][lg[x2-x1+1]][lg[y2-y1+1]], a[x2-(1<<lg[x2-x1+1])+1][y1][lg[x2-x1+1]][lg[y2-y1+1]]),max(a[x1][y2-(1<<lg[y2-y1+1])+1][lg[x2-x1+1]][lg[y2-y1+1]], a[x2-(1<<lg[x2-x1+1])+1][y2-(1<<lg[y2-y1+1])+1][lg[x2-x1+1]][lg[y2-y1+1]])); ^ user.cpp:52:110: warning: array subscript has type ‘char’ [-Wchar-subscripts] return max(max(a[x1][y1][lg[x2-x1+1]][lg[y2-y1+1]], a[x2-(1<<lg[x2-x1+1])+1][y1][lg[x2-x1+1]][lg[y2-y1+1]]),max(a[x1][y2-(1<<lg[y2-y1+1])+1][lg[x2-x1+1]][lg[y2-y1+1]], a[x2-(1<<lg[x2-x1+1])+1][y2-(1<<lg[y2-y1+1])+1][lg[x2-x1+1]][lg[y2-y1+1]])); ^ user.cpp:52:157: warning: array subscript has type ‘char’ [-Wchar-subscripts] return max(max(a[x1][y1][lg[x2-x1+1]][lg[y2-y1+1]], a[x2-(1<<lg[x2-x1+1])+1][y1][lg[x2-x1+1]][lg[y2-y1+1]]),max(a[x1][y2-(1<<lg[y2-y1+1])+1][lg[x2-x1+1]][lg[y2-y1+1]], a[x2-(1<<lg[x2-x1+1])+1][y2-(1<<lg[y2-y1+1])+1][lg[x2-x1+1]][lg[y2-y1+1]])); ^ user.cpp:52:170: warning: array subscript has type ‘char’ [-Wchar-subscripts] return max(max(a[x1][y1][lg[x2-x1+1]][lg[y2-y1+1]], a[x2-(1<<lg[x2-x1+1])+1][y1][lg[x2-x1+1]][lg[y2-y1+1]]),max(a[x1][y2-(1<<lg[y2-y1+1])+1][lg[x2-x1+1]][lg[y2-y1+1]], a[x2-(1<<lg[x2-x1+1])+1][y2-(1<<lg[y2-y1+1])+1][lg[x2-x1+1]][lg[y2-y1+1]])); ^ user.cpp:52:232: warning: array subscript has type ‘char’ [-Wchar-subscripts] return max(max(a[x1][y1][lg[x2-x1+1]][lg[y2-y1+1]], a[x2-(1<<lg[x2-x1+1])+1][y1][lg[x2-x1+1]][lg[y2-y1+1]]),max(a[x1][y2-(1<<lg[y2-y1+1])+1][lg[x2-x1+1]][lg[y2-y1+1]], a[x2-(1<<lg[x2-x1+1])+1][y2-(1<<lg[y2-y1+1])+1][lg[x2-x1+1]][lg[y2-y1+1]])); ^ user.cpp:52:245: warning: array subscript has type ‘char’ [-Wchar-subscripts] return max(max(a[x1][y1][lg[x2-x1+1]][lg[y2-y1+1]], a[x2-(1<<lg[x2-x1+1])+1][y1][lg[x2-x1+1]][lg[y2-y1+1]]),max(a[x1][y2-(1<<lg[y2-y1+1])+1][lg[x2-x1+1]][lg[y2-y1+1]], a[x2-(1<<lg[x2-x1+1])+1][y2-(1<<lg[y2-y1+1])+1][lg[x2-x1+1]][lg[y2-y1+1]])); ^