/in/foo.cc: In function 'int main()':
/in/foo.cc:5:29: warning: variable 'i1' set but not used [-Wunused-but-set-variable]
  int a, n1, n2, min1, min2, i1, i2;
                             ^~
/in/foo.cc:5:33: warning: variable 'i2' set but not used [-Wunused-but-set-variable]
  int a, n1, n2, min1, min2, i1, i2;
                                 ^~