}for(inti=1; i<=n; i++) printf("%d",ans[i]); printf("\n");return0; }
要求出这三个数,可以对系统进行询问[ l , r ] [l,r][l,r]区间内逆序对的个数,会返回这个值 } 思路: 对于这个反转之后的数列来说,[ 1 , i ] [1,i][1,i]之内的逆序对的个数为0 所以在左端点固定(= 1)的情况下,二分右端点找到这个i ii 然后对于一段反转之后的数列: 5 4 3 2 1 5 \ \...
简介:题意多组输入:{每组给出一个n,有一个长度为n的数列,在开始的时候a i = i ,有三个数i , j , k 数列反转了 [i,j−1] [j,k]要求出这三个数,可以对系统进行询问 [ l , r ] 区间内 逆序对 的个数,会返回这个值} 题目链接 题意 多组输入:{ 每组给出一个n,有一个长度为n的数列,在...
文章标签c语言codeforces#include数组ios文章分类低代码 B. Guess the Permutation time limit per test memory limit per test input output 1 ton. Denote this permutation asp. Thei-th element ofpwill be denoted aspi. For all pairs of distinct integersi, jbetween 1 andn, he wrote the numberai,...
Guess the Permutation (思维) Bob has a permutation of integers from 1 to n. Denote this permutation as p. The i-th element of p will be denoted as pi. For all pairs of distinct integers i, j between 1 and n, he wrote the n......
B. Guess the Permutation 题目连接: http://www.codeforces.com/contest/618/problem/B Description Bob has a permutation of integers from 1 to n. Denote this
Bob has a permutation of integers from 1 to n. Denote this permutation as p. The i-th element of p will be denoted as pi. For all pairs of distinct integers i, j between 1 and n, he wrote the number ai, j = min(pi, pj). He writes ai, i = 0 for all ...