/in/foo.cc: In function 'int main()':
/in/foo.cc:37:44: warning: statement has no effect [-Wunused-value]
   37 |                 if(a[i].g==a[i-1].g)a[i].gi==a[i-1].gi;
      |                                     ~~~~~~~^~~~~~~~~~~
/in/foo.cc:42:44: warning: statement has no effect [-Wunused-value]
   42 |                 if(a[i].s==a[i-1].s)a[i].si==a[i-1].si;
      |                                     ~~~~~~~^~~~~~~~~~~
/in/foo.cc:47:44: warning: statement has no effect [-Wunused-value]
   47 |                 if(a[i].b==a[i-1].b)a[i].bi==a[i-1].bi;
      |                                     ~~~~~~~^~~~~~~~~~~