inceput
intreg n, s
citeste n
s <- 0
cat timp n > 0 executa
s <- s + n * 2 - 1
n <- n - 1
sfarsit cat timp
scrie s
sfarsit
A doua varianta:
inceput
intreg n, s, i
citeste n
s <- 0
i <- 1
cat timp i <= n executa
s <- s + i * 2 - 1
i <- i + 1
sfarsit cat timp
scrie s
sfarsit