1.
program test;
var i,k2,k3,k4,k5:integer;
a:array [1..20] of integer;
begin
k2:=0;
k3:=0;
k4:=0;
k5:=0;
for i:=1 to 20 do
begin
a[i]:=random(4)+2;
if a[i]=2 then k2:=k2+1;
if a[i]=3 then k3:=k3+1;
if a[i]=4 then k4:=k4+1;
if a[i]=5 then k5:=k5+1;
write(a[i],' ')
end;
writeln;
writeln(k2);
writeln(k3);
writeln(k4);
write(k5)
end.
2.
var i,j,v:integer;
a:array [1..10] of integer;
begin
for i:=1 to 10 do
begin
a[i]:=random (100);
write(a[i]:3)
end;
for i:=1 to 9 do
for j:=1 to 9 do
if a[j]>a[j+1] then
begin
v:=a[j];
a[j]:=a[j+1];
a[j+1]:=v
end;
writeln;
for i:=1 to 10 do write(a[i]:3)
end.
3.
var a:array [1..10] of integer;
i,j,m,v:integer;
begin
randomize;
for i:=1 to 10 do
begin
a[i]:=random(100);
write(a[i]:3)
end;
writeln;
for i:=1 to 10 do
begin
m:=i;
for j:=i to 10 do
if a[m] mod 10 < a[j] mod 10 then m:=j;
v := a[i];
a[i]:= a[m];
a[m] := v;
write(a[i]:3)
end;
end.
function Len(x1,y1, x2, y2:real):real;
begin
Len := sqrt( sqr(x1 - x2) + sqr(y1 - y2) );
end;
var
x1,x2,x3,x4,x5, y1, y2, y3, y4, y5:real;
begin
write('x1 = '); readln(x1);
write('y1 = '); readln(y1);
write('x2 = '); readln(x2);
write('y2 = '); readln(y2);
write('x3 = '); readln(x3);
write('y3 = '); readln(y3);
write('x4 = '); readln(x4);
write('y4 = '); readln(y4);
write('x5 = '); readln(x5);
write('y5 = '); readln(y5);
writeln('P = ', Len(x1,y1,x2,y2) + Len(x2,y2,x3,y3) + Len(x3,y3,x4,y4) + Len(x4,y4,x5,y5) + Len(x5,y5,x1,y1));
end.
Идем от обратного - получим из числа 37 число 3 операциями "раздели на 3" и "вычти 4".
37 нацело на 3 не делится, поэтому
37-4=33
33/3=11
11-4=7
7-4=3
Вернемся к исходным обозначениям.
3+4=7
7+4=11
11*3=33
33+4=37
ответ: 2212