{"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fsimezi-tan.hatenadiary.org%2Fentry%2F20130207%2F1360180360\" title=\"Codeforces 138C (226C) Partial Sums - simezi_tan\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_url":"https://simezi-tan.hatenadiary.org/","width":"100%","blog_title":"simezi_tan\u306e\u65e5\u8a18","url":"https://simezi-tan.hatenadiary.org/entry/20130207/1360180360","published":"2013-02-07 04:52:40","type":"rich","author_name":"simezi_tan","image_url":null,"title":"Codeforces 138C (226C) Partial Sums","version":"1.0","provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/simezi_tan/","height":"190","provider_name":"Hatena Blog","categories":["Codeforces","\u6570\u5b66\u554f\u984c"],"description":"\u554f\u984c n\u9805\u304b\u3089\u306a\u308b\u6570\u5217a[i]\u304c\u4e0e\u3048\u3089\u308c\u308b\u3002 \u3053\u308c\u306b\u5bfe\u3057\u3066\u3001\u6b21\u306e\u3088\u3046\u306a\u64cd\u4f5c\u3092\u8003\u3048\u308b\u3002 s[i] = \u03a3[j = 0 to i] a[j] \u3068\u3057\u3066\u3001a[i] := s[i]\u3068\u7f6e\u304d\u63db\u3048\u308b\u3002 \u3053\u306e\u64cd\u4f5c\u3092k\u56de\u884c\u3063\u305f\u5f8c\u306ea[i]\u3092mod 10^9 + 7\u3067\u51fa\u529b\u305b\u3088\u3002 \u5236\u7d04\u6761\u4ef6 n\u22662000 a[i]\u226610^9 k\u226610^9"}