/in/foo.cc: In function 'int main()':
/in/foo.cc:32:19: warning: second operand of conditional expression has no effect [-Wunused-value]
         n>=21?21:n;
                   ^
/in/foo.cc:32:19: warning: third operand of conditional expression has no effect [-Wunused-value]
/in/foo.cc:33:13: warning: second operand of conditional expression has no effect [-Wunused-value]
   m>=21?21:m;
             ^
/in/foo.cc:33:13: warning: third operand of conditional expression has no effect [-Wunused-value]
/in/foo.cc:34:16: warning: second operand of conditional expression has no effect [-Wunused-value]
      d>=21?21:d;
                ^
/in/foo.cc:34:16: warning: third operand of conditional expression has no effect [-Wunused-value]