>
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int F(int n) {
int s, t, i, tmp;
if (n==0) return(0);
s = 1; t = 1;
for (i=2; i<=n; i++) {
tmp = s+t;
s = t; t = tmp;
}
return(s);
}
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>
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function Freturn = F(n)
if (n == 0)
Freturn = 0
end
s = 1; t = 1;
for i = 2..n
tmp = s+t;
s = t; t = tmp;
end
Freturn = s;
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