/in/foo.cc: In function 'int main()':
/in/foo.cc:14:28: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   14 |                 if(!('A'<=e&&e<='Z'||'A'<=o&&o<='Z')){
      |                      ~~~~~~^~~~~~~~
/in/foo.cc:27:30: warning: array subscript has type 'char' [-Wchar-subscripts]
   27 |                 if(iscorresp[x]){
      |                              ^
/in/foo.cc:31:27: warning: array subscript has type 'char' [-Wchar-subscripts]
   31 |                 iscorresp[x]=true;
      |                           ^