/in/foo.cc: In function 'int main()':
/in/foo.cc:24:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   cin >> tg+1;
          ~~^~
/in/foo.cc:33:7: warning: variable 'out' set but not used [-Wunused-but-set-variable]
  auto out = [=](){
       ^~~