/in/foo.cc: In function 'int main()':
/in/foo.cc:38:9: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   cin>>A+1; n=strlen(A+1);
        ~^~
/in/foo.cc:40:9: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   cin>>B+1; m=strlen(B+1);
        ~^~