program sly;
uses crt;
const n=10;
type coord=array[1..n] of integer;
function dist(x1,y1,x2,y2:integer):real;
begin
dist:=sqrt(sqr(x2-x1)+sqr(y2-y1));
end;
function perim(x,y:coord):real;
var r,p:real;
i:integer;
begin
perim:=0; p:=0;
for i:=1 to n-1 do
begin
r:=dist(x[i],y[i],x[i+1],y[i+1]);
p:=p+r;
end;
r:=dist(x[1],y[1],x[n],y[n]);
p:=p+r;
perim:=p;
end;
var x,y:coord;
i:byte;
begin
clrscr;
randomize;
for i:=1 to n do
begin
x[i]:=random(32);
y[i]:=random(32);
end;
for i:=1 to n do
writeln('(',x[i],',',y[i],')');
writeln('Perimeter=',perim(x,y):6:3);
end.