10-排序6 Sort with Swap(0, i) (25point(s)) Given any permutation of the numbers {0, 1, 2,..., N−1}, it is easy to sort them in increasing order. But what if Swap(0, *) is the ONLY operation that is allowed to use? For example, to sort {4, 0, 2, 1, 3} w…

1067. Sort with Swap(0,*) (25)   Given any permutation of the numbers {0, 1, 2,..., N-1}, it is easy to sort them in increasing order. But what if Swap(0, *) is the ONLY operation that is allowed to use? For example, to sort {4, 0, 2, 1, 3} we may ap…

1067. Sort with Swap(0,*) (25) 时间限制 150 ms 内存限制 65536 kB 代码长度限制 16000 B 判题程序 Standard 作者 CHEN, Yue Given any permutation of the numbers {0, 1, 2,..., N-1}, it is easy to sort them in increasing order. But what if Swap(0, *) is the ONLY operation that…

题目地址 https://pta.patest.cn/pta/test/16/exam/4/question/678 5-16 Sort with Swap(0, i)   (25分) Given any permutation of the numbers {0, 1, 2,..., N-1N−1}, it is easy to sort them in increasing order. But what if Swap(0, *) is the ONLY operation that is…

7-16 Sort with Swap(0, i)(25 分) Given any permutation of the numbers {0, 1, 2,..., N−1}, it is easy to sort them in increasing order. But what if Swap(0, *) is the ONLY operation that is allowed to use? For example, to sort {4, 0, 2, 1, 3} we may app…

题目信息 1067. Sort with Swap(0,*) (25) 时间限制150 ms 内存限制65536 kB 代码长度限制16000 B Given any permutation of the numbers {0, 1, 2,-, N-1}, it is easy to sort them in increasing order. But what if Swap(0, *) is the ONLY operation that is allowed to use? For exa…

题目链接:1067 Sort with Swap(0, i) (25 分) 题意 给定长度为 \(n\) 的排列,如果每次只能把某个数和第 \(0\) 个数交换,那么要使排列是升序的最少需要交换几次. 思路 贪心 由于是排列,所以排序后第 \(i\) 个位置上的数就是 \(i\).所以当 \(a[0] \neq 0\) 时,把 \(a[0]\) 位置上的元素交换到相应位置.如果 \(a[0] = 0\),就找到第一个不在正确位置上的数,把它与第 \(0\) 个数交换,那么下一次又是第一种情况了,…

Source: PAT A1067 Sort with Swap(0, i) (25 分) Description: Given any permutation of the numbers {0, 1, 2,..., N−1}, it is easy to sort them in increasing order. But what if Swap(0, *) is the ONLY operation that is allowed to use? For example, to sort…

1067 Sort with Swap(0, i) (25 分) Given any permutation of the numbers {0, 1, 2,..., N−1}, it is easy to sort them in increasing order. But what if Swap(0, *) is the ONLY operation that is allowed to use? For example, to sort {4, 0, 2, 1, 3} we may ap…

PAT1067. Sort with Swap(0, *) (25) 并查集 题目大意 给定一个序列, 只能进行一种操作: 任一元素与 0 交换位置, 问最少需要多少次交换. 思路 最优解就是每次 0 都和所在位置本应在的元素交换位置, 共 n - 1 次, 但是在交换中 0 可能会被交换到 0 号位置. 仔细思考一下, 其实每次换到 0 就是一个图的连通分量, 按照输入的次序和输入的值, 可以求出图共有多少个联通分量. 每个联通分量若要换回去, 需要 n - 1 次交换, 但是只能用 0 交换…