#include <stdio.h>
//課題3
int rec(int n){
//rec内を完成させてください
if(n==0) return 3;
else if(n==1) return 0;
else if(n==2) return 2;
else return rec(n-2)+rec(n-3);
}
int main(void) {
int n = 50;
for(int i = 0; i <= n; i++){
printf("第%d項は%d/ ", i
,rec
(i
)); }
return 0;
}
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