/in/foo.cc: In function 'int main()':
/in/foo.cc:17:58: error: incompatible types in assignment of 'bool' to 'bool [1000]'
   for(i=0;i<=j;i++) {if(coin[i]) coin[i]=false;else coin=true;n++;if(ok(m,coin)) break;}
                                                          ^~~~