摘要： A - Cow Contest N (1 ≤ N ≤ 100) cows, conveniently numbered 1..N, are participating in a programming contest. As we all know, some cows code better th 阅读全文

摘要： J. Circular Dance There are n kids, numbered from 11 to n, dancing in a circle around the Christmas tree. Let's enumerate them in a clockwise directio 阅读全文

摘要： C. Nice Garland You have a garland consisting of nn lamps. Each lamp is colored red, green or blue. The color of the ii-th lamp is si ('R', 'G' and 'B 阅读全文

摘要： D. Diverse Garland You have a garland consisting of n lamps. Each lamp is colored red, green or blue. The color of the ii-th lamp is si('R', 'G' and ' 阅读全文

摘要： G. Array Stabilization You are given an array aa consisting of nn integer numbers. Let instability of the array be the following value: maxi=1nai−mini 阅读全文

摘要： E. Repeating Cipher Polycarp loves ciphers. He has invented his own cipher called repeating. Repeating cipher is used for strings. To encrypt the stri 阅读全文

摘要： B. Divisors of Two Integers Recently you have received two positive integer numbers xx and y. You forgot them, but you remembered a shuffled list cont 阅读全文

摘要： A. Two distinct points You are given two segments l1;r1 and l2;r2 on the xx-axis. It is guaranteed that l1<r1l1<r1 and l2<r2l2<r2. Segments may inters 阅读全文

摘要： I. Powers Of Two A positive integer xx is called a power of two if it can be represented as x=2yx=2y, where y is a non-negative integer. So, the power 阅读全文

摘要： I - 还是畅通工程 某省调查乡村交通状况，得到的统计表中列出了任意两村庄间的距离。省政府“畅通工程”的目标是使全省任何两个村庄间都可以实现公路交通（但不一定有直接的公路相连，只要能间接通过公路可达即可），并要求铺设的公路总长度为最小。请计算最小的公路总长度。 Input 测试输入包含若干测试用例。 阅读全文