Cod sursa(job #624132)
Utilizator | Data | 21 octombrie 2011 19:55:57 | |
---|---|---|---|
Problema | Fractii | Scor | 0 |
Compilator | fpc | Status | done |
Runda | Arhiva de probleme | Marime | 0.38 kb |
var f,g:text;
s,x,y,i,j,n:integer;
function divizor(x,y:integer):integer;
BEGIN
while x<>y do
if x>y then x:=x-y
else y:=y-x;
divizor:=x;
END;
BEGIN
assign(f,'fractii.in');reset(f);
assign(g,'fractii.out');rewrite(g);
read(f,n);
close(f);
s:=2*n-1;
for i:=2 to (n div 2+1) do
for j:=2 to n do
if divizor(i,j)=1 then s:=s+2;
write(g,s);
close(g);
end.