/in/foo.cc: In function 'int main()':
/in/foo.cc:21:67: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'bool*' [-Wformat=]
     for(int i=1;i<=n;i++)for(int j=1;j<=m;j++)scanf("%d",&b1[i][j]);
                                                          ~~~~~~~~~^