Compilare: user.cpp: In function ‘int main()’: user.cpp:39:12: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] fin >> s1 + 1 >> s2 + 1; ^ user.cpp:39:22: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] fin >> s1 + 1 >> s2 + 1; ^ user.cpp:43:10: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[s2[i]].push_back(i), cnt2[s2[i]]++; ^ user.cpp:43:36: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[s2[i]].push_back(i), cnt2[s2[i]]++; ^ user.cpp:46:13: warning: array subscript has type ‘char’ [-Wchar-subscripts] cnt1[s1[i]]++; ^ user.cpp:56:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] perm[i] = a[s1[i]][ a[s1[i]].size() - 1 ]; ^ user.cpp:56:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] perm[i] = a[s1[i]][ a[s1[i]].size() - 1 ]; ^ user.cpp:57:10: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[s1[i]].pop_back(); ^