package main
import (
"fmt"
)
func main() {
n := 10
fmt.Print(solution(n))
}
func solution(n int) int {
answer := 0
if n%2 == 1 {
for i := 0; i <= n; i++ {
if i%2 == 1 {
answer += i
}
}
} else {
for i := 1; i <= n; i++ {
if i%2 == 0 {
answer += i * i
}
}
}
return answer
}