#include <stdio.h>
int main(void) {
int a[33],b,i;
a[0]=2; a[1]=-1;
for(i=2;i<33;i++);
a[i]=-a[i-1]+a[i-2]+2;
b=a[0]+a[4]+a[8]+a[12]+a[16]+a[20]+a[24]+a[28]+a[32];
return 0;
}
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