prob002.go

//usr/bin/env go run $0 $@ ; exit

package main

import (
    "fmt"
)

func main() {
    sum := 0
    for n, m := 1, 2; n < 4000000; n, m = m, n + m {
        if n % 2 == 0 {
            sum += n
        }
    }
    fmt.Println(sum)
}