15 lines
185 B
Java
15 lines
185 B
Java
public static long itFibN(int n)
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{
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if (n < 2)
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return n;
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long ans = 0;
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long n1 = 0;
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long n2 = 1;
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for(n--; n > 0; n--)
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{
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ans = n1 + n2;
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n1 = n2;
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n2 = ans;
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}
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return ans;
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}
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