const N=5;
var
a:array[1..N] of integer;
i, K, m: byte;
begin
K:=0; m:=0;
For i:=1 to N do
begin
Read (a[i]);
IF a[i]=0 then begin
K:=K+1;
IF K=1 THEN
m:=i
end;
end;
IF m>0 then
write ('m=' , m) ;
END.