Compilare: user.cpp: In function ‘bool cmp(const int&, const int&)’: user.cpp:24:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] return v[mat[a][i]] < v[mat[b][i]]; ^ user.cpp:24:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] return v[mat[a][i]] < v[mat[b][i]]; ^ user.cpp: In function ‘int main()’: user.cpp:38:13: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] fin >> cuv + 1; ^ user.cpp:41:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[cuv[i]] = i; ^ user.cpp:45:17: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] fin >> mat[i] + 1; ^