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...
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 Maybe i would feel much m...
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 d...
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...