質問編集履歴
1
ごじら
title
CHANGED
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File without changes
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body
CHANGED
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@@ -61,8 +61,7 @@
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61
61
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62
62
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for(int i=0; i<N; i++) {
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63
63
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sum -= A[i];
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64
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-
sum %
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64
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+
ans += (A[i] * sum) % (1000000000 + 7);
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65
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-
ans += A[i] * sum;
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66
65
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ans %= (1000000000 + 7);
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67
66
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}
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68
67
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cout << ans;
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