{"published":"2026-04-17 21:01:53","height":"190","description":"https://atcoder.jp/contests/abc453/tasks/abc453_c1\u56de\u305a\u3064\u518d\u5e30\u7684\u306b\u9032\u3081\u3070\u306e\u8a08\u7b97\u91cf\u3067\u3059\u304c\u3001\u6642\u9593\u304c\u30ae\u30ea\u30ae\u30ea\u3067\u3059\u3002 v <- scan(\"stdin\", integer()) N <- v[1] L <- v[2:(N+1)] F <- function(L, i, x) { if(i == N + 1) { return(0) } x1 <- x + L[i] # \u6b63\u65b9\u5411\u306b\u9032\u3080 n1 <- F(L, i+1, x1) if(x < 0 && 0 < x1) { n1 <- n1 + 1 } x2 <- x - L[i] n2 <- F(L, i+1,\u2026","author_url":"https://blog.hatena.ne.jp/inamori/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Finamori.hateblo.jp%2Fentry%2F2026%2F04%2F17%2F210153\" title=\"AtCoder Beginner Contest 453 C - inamori\u2019s diary\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_name":"Hatena Blog","blog_url":"https://inamori.hateblo.jp/","url":"https://inamori.hateblo.jp/entry/2026/04/17/210153","categories":[],"author_name":"inamori","version":"1.0","type":"rich","width":"100%","title":"AtCoder Beginner Contest 453 C","provider_url":"https://hatena.blog","blog_title":"inamori\u2019s diary","image_url":null}