Compilare: main.cpp: In function 'void solve(char, char, char, char)': main.cpp:21:12: warning: array subscript has type 'char' [-Wchar-subscripts] 21 | if(mem[lin1][col1][lin2][col2]) | ^~~~ main.cpp:21:18: warning: array subscript has type 'char' [-Wchar-subscripts] 21 | if(mem[lin1][col1][lin2][col2]) | ^~~~ main.cpp:21:24: warning: array subscript has type 'char' [-Wchar-subscripts] 21 | if(mem[lin1][col1][lin2][col2]) | ^~~~ main.cpp:21:30: warning: array subscript has type 'char' [-Wchar-subscripts] 21 | if(mem[lin1][col1][lin2][col2]) | ^~~~ main.cpp:25:29: warning: array subscript has type 'char' [-Wchar-subscripts] 25 | int current_value = mat[lin2][col2] - mat[lin1 - 1][col2] - mat[lin2][col1 - 1] + mat[lin1 - 1][col1 - 1]; | ^~~~ main.cpp:25:35: warning: array subscript has type 'char' [-Wchar-subscripts] 25 | int current_value = mat[lin2][col2] - mat[lin1 - 1][col2] - mat[lin2][col1 - 1] + mat[lin1 - 1][col1 - 1]; | ^~~~ main.cpp:25:57: warning: array subscript has type 'char' [-Wchar-subscripts] 25 | int current_value = mat[lin2][col2] - mat[lin1 - 1][col2] - mat[lin2][col1 - 1] + mat[lin1 - 1][col1 - 1]; | ^~~~ main.cpp:25:69: warning: array subscript has type 'char' [-Wchar-subscripts] 25 | int current_value = mat[lin2][col2] - mat[lin1 - 1][col2] - mat[lin2][col1 - 1] + mat[lin1 - 1][col1 - 1]; | ^~~~ main.cpp:26:9: warning: array subscript has type 'char' [-Wchar-subscripts] 26 | mem[lin1][col1][lin2][col2] = true; | ^~~~ main.cpp:26:15: warning: array subscript has type 'char' [-Wchar-subscripts] 26 | mem[lin1][col1][lin2][col2] = true; | ^~~~ main.cpp:26:21: warning: array subscript has type 'char' [-Wchar-subscripts] 26 | mem[lin1][col1][lin2][col2] = true; | ^~~~ main.cpp:26:27: warning: array subscript has type 'char' [-Wchar-subscripts] 26 | mem[lin1][col1][lin2][col2] = true; | ^~~~ main.cpp: In function 'int main()': main.cpp:41:22: warning: array subscript has type 'char' [-Wchar-subscripts] 41 | fin>>mat[i][j]; | ^ main.cpp:41:25: warning: array subscript has type 'char' [-Wchar-subscripts] 41 | fin>>mat[i][j]; | ^ main.cpp:42:17: warning: array subscript has type 'char' [-Wchar-subscripts] 42 | mat[i][j] += mat[i-1][j] + mat[i][j-1] - mat[i-1][j-1]; | ^ main.cpp:42:20: warning: array subscript has type 'char' [-Wchar-subscripts] 42 | mat[i][j] += mat[i-1][j] + mat[i][j-1] - mat[i-1][j-1]; | ^