{"provider_name":"Hatena Blog","title":"AtCoder Beginner Contest 159 \u89e3\u6cd5","categories":[],"url":"https://blog.ngtkana.com/entry/2020/03/23/003350","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/n/ngtkana/20200323/20200323002539.png","author_name":"ngtkana","description":"\u7d50\u679c 56 \u5206 + 1 \u30da\u30ca\u5168\u5b8c\u3001159 \u4f4d\u3067\u3059\u3002\u4e00\u76ee\u77ad\u7136\u306a\u306e\u3067\u3059\u304c\u3001\u72af\u4eba\u306f\u30a2\u30ca\u30bf\uff08 E \u554f\u984c\uff09\u3067\u3059\uff01 \u305f\u3060\u3053\u308c\u3070\u304b\u308a\u306f\u3001\u305d\u3082\u305d\u3082\u304b\u306a\u308a\u96e3\u3057\u76ee\u306b\u611f\u3058\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u304b\u3089\u3001\u7acb\u3061\u56de\u308a\u306e\u554f\u984c\u3067\u3082\u306a\u3055\u305d\u3046\u3067\u3059\u3002\u9806\u4f4d\u8868\u3092\u8997\u304f\u3068\u30ad\u30ec\u30a4\u306a\u50be\u659c\u306e\u3088\u3046\u3067\u3059\u304b\u3089\u3001\u82e6\u624b\u5206\u91ce\u3067\u3057\u3087\u3046\u304b\u3002\u3082\u3057\u304f\u306f\u3001F \u304c\u5f97\u610f\u3060\u3063\u305f\u306e\u3067\u3057\u3087\u3046\u304b\u3002 A - The Number of Even Pairs (00:01:01) \u6c17\u6301\u3061\u6025\u304e\u76ee\u3067\u5b9f\u88c5\u3057\u307e\u3057\u305f\u3002\u304b\u306a\u308a\u65e9\u3044\u65b9\u3067\u3059\u3002 \u5076\u6570\u540c\u58eb\u3001\u5947\u6570\u540c\u58eb\u306e\u5834\u5408\u306e\u6570\u3092\u6570\u3048\u307e\u3057\u3087\u3046\u3002 lint x,y;std::cin>>x>>y; std::cout<<(x*(x-1)/2+y*(y-1)/2)<<'\\\u2026","author_url":"https://blog.hatena.ne.jp/ngtkana/","blog_title":"\u30d6\u30ed\u30b0\u540d","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.ngtkana.com%2Fentry%2F2020%2F03%2F23%2F003350\" title=\"AtCoder Beginner Contest 159 \u89e3\u6cd5 - \u30d6\u30ed\u30b0\u540d\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2020-03-23 00:33:50","height":"190","width":"100%","version":"1.0","blog_url":"https://blog.ngtkana.com/","provider_url":"https://hatena.blog","type":"rich"}