回答編集履歴
1
for を while に変更
answer
CHANGED
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@@ -7,7 +7,7 @@
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7
7
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if (n < 1 || n > 20 || n1 < 1 || n1 > 9 || n2 < 1 || n2 > 9) r = 0;
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8
8
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else if (n == 1) r = n1;
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9
9
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else if (n == 2) r = n2;
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10
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-
else
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10
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+
else while (--n > 1) r = n1 + n2, n1 = n2, n2 = r;
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11
11
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return *result = r;
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12
12
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}
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13
13
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