Compilare: main.cpp: In function 'int main()': main.cpp:42:38: warning: array subscript has type 'char' [-Wchar-subscripts] 42 | sums[mat[i][j]][i][j] = 1; | ~~~~~~~~^ main.cpp:62:41: warning: array subscript has type 'char' [-Wchar-subscripts] 62 | if(sums[c][i][j] - sums[c][i][col] - sums[c][row][j] + sums[c][row][col] == (size + step) * (size + step)) | ^ main.cpp:62:57: warning: array subscript has type 'char' [-Wchar-subscripts] 62 | if(sums[c][i][j] - sums[c][i][col] - sums[c][row][j] + sums[c][row][col] == (size + step) * (size + step)) | ^ main.cpp:62:75: warning: array subscript has type 'char' [-Wchar-subscripts] 62 | if(sums[c][i][j] - sums[c][i][col] - sums[c][row][j] + sums[c][row][col] == (size + step) * (size + step)) | ^ main.cpp:62:93: warning: array subscript has type 'char' [-Wchar-subscripts] 62 | if(sums[c][i][j] - sums[c][i][col] - sums[c][row][j] + sums[c][row][col] == (size + step) * (size + step)) | ^