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#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
const int N = 30;
LL a[N];
int main() {
a[1] = 1;
a[2] = 2;
for (int i = 3; i < N; i++)
a[i] = a[i - 1] + a[i - 2];
for (int i = 1; i <= 20; i++)
printf("%lld ", a[i]);
return 0;
}