#include <stdio.h>
int main(void) {
#include <stdio.h>
int main() {
int a[31];
a[0] = 2;
a[1] = -1;
for (int i = 2; i <= 29; i++) {
a[i] = -a[i-1] + a[i-2] + 2;
}
printf("a[29] = %d\n", a
[29]);
return 0;
}
return 0;
}
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