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fn main() { |
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let mut a1 = 1; |
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let mut a2 = 2; |
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let mut sum = 0; |
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while a2 <= 4_000_000 { |
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if a2 % 2 == 0 { |
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sum += a2; |
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} |
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let a_new = a1 + a2; |
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a1 = a2; |
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a2 = a_new; |
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// println!("{}", a_new); |
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} |
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println!("{}", sum); |
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} |
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