Compilare: user.cpp: In function ‘int main()’: user.cpp:13:14: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] f>>c[i]+1; ^ user.cpp:16:13: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] f>>s+1; ^ user.cpp:18:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] F[s[j]]++; ^ user.cpp:28:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(F[k]!=v[i][j]+v[i-n][j-n]-v[i-n][j]-v[i][j-n]) ^