POJ 3617 Best Cow Line【贪心】
2017-11-29 23:03
387 查看
Description
FJ is about to take his N (1 ≤ N ≤ 2,000) cows to the annual”Farmer of the Year” competition. In this contest every farmer arranges his cows in a line and herds them past the judges.
The contest organizers adopted a new registration scheme this year: simply register the initial letter of every cow in the order they will appear (i.e., If FJ takes Bessie, Sylvia, and Dora in that order he just registers BSD). After the registration phase ends, every group is judged in increasing lexicographic order according to the string of the initials of the cows’ names.
FJ is very busy this year and has to hurry back to his farm, so he wants to be judged as early as possible. He decides to rearrange his cows, who have already lined up, before registering them.
FJ marks a location for a new line of the competing cows. He then proceeds to marshal the cows from the old line to the new one by repeatedly sending either the first or last cow in the (remainder of the) original line to the end of the new line. When he’s finished, FJ takes his cows for registration in this new order.
Given the initial order of his cows, determine the least lexicographic string of initials he can make this way.
Input
Line 1: A single integer: N
Lines 2..N+1: Line i+1 contains a single initial (‘A’..’Z’) of the cow in the ith position in the original line
Output
The least lexicographic string he can make. Every line (except perhaps the last one) contains the initials of 80 cows (‘A’..’Z’) in the new line.
Sample Input
Sample Output
Code
FJ is about to take his N (1 ≤ N ≤ 2,000) cows to the annual”Farmer of the Year” competition. In this contest every farmer arranges his cows in a line and herds them past the judges.
The contest organizers adopted a new registration scheme this year: simply register the initial letter of every cow in the order they will appear (i.e., If FJ takes Bessie, Sylvia, and Dora in that order he just registers BSD). After the registration phase ends, every group is judged in increasing lexicographic order according to the string of the initials of the cows’ names.
FJ is very busy this year and has to hurry back to his farm, so he wants to be judged as early as possible. He decides to rearrange his cows, who have already lined up, before registering them.
FJ marks a location for a new line of the competing cows. He then proceeds to marshal the cows from the old line to the new one by repeatedly sending either the first or last cow in the (remainder of the) original line to the end of the new line. When he’s finished, FJ takes his cows for registration in this new order.
Given the initial order of his cows, determine the least lexicographic string of initials he can make this way.
Input
Line 1: A single integer: N
Lines 2..N+1: Line i+1 contains a single initial (‘A’..’Z’) of the cow in the ith position in the original line
Output
The least lexicographic string he can make. Every line (except perhaps the last one) contains the initials of 80 cows (‘A’..’Z’) in the new line.
Sample Input
6 A C D B C B
Sample Output
ABCBCD
Code
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int N = sc.nextInt(); char data[] = new char ; for (int i = 0; i < N; i++) data[i] = sc.next().charAt(0); int a = 0, b = N - 1, count = 0; boolean flag = true; while (a <= b) { for (int i = 0; a + i <= b; i++) { char head = data[a + i]; char tail = data[b - i]; if (head < tail) { flag = true; count++; break; } else if (head > tail) { flag = false; count++; break; } } if (flag) System.out.printf("%c", data[a++]); else System.out.printf("%c", data[b--]); /* 注意换行 */ if (count % 80 == 0) System.out.println(); } System.out.println(); } }
相关文章推荐
- Best Cow Line(POJ 3617) 贪心
- POJ 3617 - Best Cow Line(贪心)
- Poj 3617 Best Cow Line【贪心】
- POJ 3617 best cow line 贪心法
- POJ 3617 Best Cow Line(贪心+最小字典序)
- Best Cow Line POJ - 3617 【贪心】
- POJ 3617 Best Cow Line (贪心)
- POJ 3617 Best Cow Line [贪心] 《挑战程序设计竞赛》2.2
- poj 3617 Best Cow Line(简单贪心)
- POJ 3617 Best Cow Line (贪心)
- POJ 3617 Best Cow Line 贪心
- POJ 3617 Best Cow Line (贪心)
- POJ 3617 Best Cow Line [贪心] [字典序最小]
- poj 3617 Best Cow Line 【贪心】
- POJ 3617 Best Cow Line 【贪心】
- POJ 3617 Best Cow Line (贪心)
- POJ - 3617 Best Cow Line (贪心)
- POJ:3617-Best Cow Line(贪心)
- POJ 3617 Best Cow Line (贪心)
- POJ - 3617 Best Cow Line(贪心)