Compilare: user.cpp: In function ‘void Fill(int, int, int)’: user.cpp:45:34: warning: array subscript has type ‘char’ [-Wchar-subscripts] start[finish[current]][current] = make_pair(l, c); ^ user.cpp: In function ‘int main()’: user.cpp:161:21: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] cin >> a[i] + 1; ^ user.cpp:179:21: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] a[i][m + 1] = NULL; ^