Таблица истинности. : )
a|b^(неc^d)

Function prime(x:integer):boolean;
var
 t:boolean;
 d:integer;
begin
 t := true;
 d := 2;
 while t and (d*d <= x) do
   begin
   if x mod d = 0 then 
     t := false;
   d := d + 1
   end;
 prime := t
end;

function order(x:integer):boolean;
var
 t:boolean;
 d:integer;
begin
 d := -1;
 repeat
   t := x mod 10 > d;
   d := x mod 10;
   x := x div 10
 until not t or (x = 0);
 order := t
end;

var
 t:boolean;
 i,k,n:integer;
begin
 t := false;
 read(k,n);
 for i := k to n do
   if prime(i) then
   if order(i) then
     begin
     write(i,' ');
     t := true
     end;
 if not t then
   write(0)
end.

#include <iostream>

#include<vector>

using namespace std;

int square(int x){

for (int i = 1; i <= 45; ++i){

if (i * i <= x){

continue;

}

return (i - 1) * (i - 1);

}

}

int main()

{

int x, y, xwas, ywas, xywas;

cin >> x >> y;

xwas = square(x);

ywas = square(y);

xywas = square(x + y);

if (xwas + ywas < xywas){

cout << "Petya gives paint to Vasya";

}

else if (xwas + ywas == xywas){

cout << "Equal";

}

else {

cout << "Petya leaves paint to himself";

}

return 0;

}#include <iostream>

#include<vector>

using namespace std;

int square(int x){

for (int i = 1; i <= 45; ++i){

if (i * i <= x){

continue;

}

return (i - 1) * (i - 1);

}

}

int main()

{

int x, y, xwas, ywas, xywas;

cin >> x >> y;

xwas = square(x);

ywas = square(y);

xywas = square(x + y);

if (xwas + ywas < xywas){

cout << "Petya gives paint to Vasya";

}

else if (xwas + ywas == xywas){

cout << "Equal";

}

else {

cout << "Petya leaves paint to himself";

}

return 0;

}

Объяснение: