var i,j,k,m: integer; s: string; begin k:=0; for i:=1 to 1000000 do begin s:=IntToStr(i); m:=0; for j:=1 to (length(s) div 2) do if s[j]<>s[length(s)-j+1] then m:=1; if m=0 then begin inc(k); continue; end; m:=pos('0',s); if m>0 then begin inc(k); continue; end; m:=1; for j:=2 to round(sqrt(i)) do if i mod j = 0 then begin m:=0; break; end; if m=1 then inc(k); end; k:=1000000-k; writeln('осталось чисел: ',k); end.
осталось чисел: 544011
Лоскутова
05.04.2023
var i,j,k,m: integer; s: string; begin k:=0; for i:=1 to 1000000 do begin s:=IntToStr(i); m:=0; for j:=1 to (length(s) div 2) do if s[j]<>s[length(s)-j+1] then m:=1; if m=0 then begin inc(k); continue; end; m:=pos('0',s); if m>0 then begin inc(k); continue; end; m:=1; for j:=2 to round(sqrt(i)) do if i mod j = 0 then begin m:=0; break; end; if m=1 then inc(k); end; k:=1000000-k; writeln('осталось чисел: ',k); end.
s: string;
begin
k:=0;
for i:=1 to 1000000 do
begin
s:=IntToStr(i);
m:=0;
for j:=1 to (length(s) div 2) do
if s[j]<>s[length(s)-j+1] then m:=1;
if m=0 then
begin
inc(k); continue;
end;
m:=pos('0',s);
if m>0 then
begin
inc(k); continue;
end;
m:=1;
for j:=2 to round(sqrt(i)) do
if i mod j = 0 then
begin
m:=0;
break;
end;
if m=1 then inc(k);
end;
k:=1000000-k;
writeln('осталось чисел: ',k);
end.
осталось чисел: 544011