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.
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.
using namespace std;
void main()
{
int arr[10]={1,5,1,1,2,9,5,2,3,1};
int counter=0;
for(int i=0; i<10; ++i)
for(int j=9; j>i; --j)
if(arr[i]==arr[j])
{
++counter;
break;
}
}