#include <stdio.h>
int main(){
int an , n;
an = 3;
n = 0;
while( an < 10000 )
{
an = 2 * an - 1;
n = n + 1;
}
printf("数列が初めて10000を超えるときの値は、%dで%d番目である。\n",an
,n
);
return 0;
}
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