#include <stdio.h>
//フィボナッチ数列(再帰なし版)
int main(void) {
    int n = 10;
//ここを埋める
	int a,b=1,c=1;
    for(int i = 3; i <= n; i++){
//ここも埋める
	a=b+c;
	c=b;
	b=a;
 
    }
    printf("フィボナッチ数列の第%d項は%d\n", n
, a
); 	return 0;
}
 
 
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