16 lines
215 B
Plaintext
16 lines
215 B
Plaintext
include "std/io.zr"
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func main[] : i64
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sum := 0
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a := 0
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b := 1
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while a < 4000000
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if a % 2 == 0
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sum += a
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temp := b
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b += a
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a = temp
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io.println_i64(sum)
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