It is guaranteed that the sum ofnn over all test cases does not exceed20002000 (∑n≤2000∑n≤2000). Output For each test case, print the answer — such a stringss of lengthnn consisting of lowercase Latin letters thateach substring of lengthaa hasexactlybb distinct letters. If there are...
1.初始构造一颗单链树,依次把底部的节点放入上面的层,直到满足深度总和为d 2.若当前深度总和sum > d,则先拿掉底端节点。 拿掉后,若sum依然比d大,就直接把底端节点放入有空位的最上层; 拿掉后sum <= d,dif = d - sum。 若dif >= 此时有空位的最上层深度,则深度为dif的层一定有空位,把底端节点放入该...
It is guaranteed that the sum of nn over all test cases does not exceed 20002000 (∑n≤2000∑n≤2000). Output For each test case, print the answer — such a string ss of length nn consisting of lowercase Latin letters that each substring of length aa has exactly bb distinct letters. I...
codeforce 1311E. Construct the Binary Tree (构造,就是个模拟) ACM思维题训练集合You are given two integers n and d. You need to construct a rooted binary tree consisting of n vertices with a root at the vertex 1 and the sum of depths of all vertices equals to d. A tree is a connect...
Hello cf community, I always get stuck at finding patterns if I have to create them from scratch, but other constructive problems around similar or even higher levels i can solve easily.. Eg of what I'm talking about: https://www.codechef.com/problems/GRIDEVEN ...
Codeforces Round #634 B. Construct the String(贪心) 题目描述 You are given three positive integers n n n , a a a and b b b . You have to construct a string s s s of length n n n consisting of lowercase Latin letters such that each substring of length a a a has exactly b b ...
Below one can find one of the possible solutions for the third sample case. The sum of subtree sizes equals6+3+2+1+2+1=15 , and the branching coefficient equals2 . 题意:给定N,S,让你构造一个大小为N的数,使得每个节点子树大小之和为S,如果存在,请构造一个树,使得儿子最多的点的儿子数量(...
It is guaranteed that the sum ofnn over all test cases does not exceed20002000 (∑n≤2000∑n≤2000). Output For each test case, print the answer — such a stringss of lengthnn consisting of lowercase Latin letters thateach substring of lengthaa hasexactlybb distinct letters. If there are...