#include <stdio.h>
//練習問題E
int try(int n){
if(n==0 || n==1){
return 0;
}
else if(n==2){
return 1;
}
else{
return n=try(n-1)+try(n-2)+try(n-3);
}
}
int main(void) {
int n = 7;
printf("数列Tnについて, n=%dのときの値は%d\n", n
, try
(n
)); return 0;
}
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