PAT 甲级 1133. Splitting A Linked List (25)
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Given a singly linked list, you are supposed to rearrange its elements so that all the negative values appear before all of the non-negatives, and all the values in [0, K] appear before all those greater than K. The order of the elements inside each class must not be changed. For example, given the list being 18→7→-4→0→5→-6→10→11→-2 and K being 10, you must output -4→-6→-2→7→0→5→10→18→11.
Input Specification:
Each input file contains one test case. For each case, the first line contains the address of the first node, a positive N (<= 105) which is the total number of nodes, and a positive K (<=1000). The address of a node is a 5-digit nonnegative integer, and NULL is represented by -1.
Then N lines follow, each describes a node in the format:
Address Data Next
where Address is the position of the node, Data is an integer in [-105, 105], and Next is the position of the next node. It is guaranteed that the list is not empty.
Output Specification:
For each case, output in order (from beginning to the end of the list) the resulting linked list. Each node occupies a line, and is printed in the same format as in the input.
Sample Input:
00100 9 10
23333 10 27777
00000 0 99999
00100 18 12309
68237 -6 23333
33218 -4 00000
48652 -2 -1
99999 5 68237
27777 11 48652
12309 7 33218
Sample Output:
33218 -4 68237
68237 -6 48652
48652 -2 12309
12309 7 00000
00000 0 99999
99999 5 23333
23333 10 00100
00100 18 27777
27777 11 -1
#include <iostream>#include <vector>using namespace std;struct node { int data, next;}list[100000];vector<int> v[3];int main() { int start, n, k, a; scanf("%d%d%d", &start, &n, &k); for (int i = 0; i < n; i++) { scanf("%d", &a); scanf("%d%d", &list[a].data, &list[a].next); } int p = start; while (p != -1) { int data = list[p].data; if (data < 0) v[0].push_back(p); else if (data >= 0 && data <= k) v[1].push_back(p); else v[2].push_back(p); p = list[p].next; } int flag = 0; for (int i = 0; i < 3; i++) { for (int j = 0; j < v[i].size(); j++) { if (flag == 0) { printf("%05d %d ", v[i][j], list[v[i][j]].data); flag = 1; } else { printf("%05d\n%05d %d ", v[i][j], v[i][j], list[v[i][j]].data); } } } printf("-1"); return 0;}
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