C. Pearls in a Row time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There are n pearls in a row. Let's enumerate them with integers from 1 to n from the left to the right. The pearl number…

d.有一串数字,要把这些数字分成若干连续的段,每段必须至少包含2个相同的数字,怎么分才能分的段数最多? 比如 是1 2 1 3 1 2 1 那么 答案是 21 34 7 即最多分在2段,第一段是1~3,第二段是4~7. 即分成这2段:1 2 1,3 1 2 1 s.很不错的一道贪心的题.当时没怎么细想,后来看了tourist的代码后得知. 可以证明,满足贪心选择性质和最优子结构性质. 贪心策略是:从前向后遍历,每次选择最小长度的符合条件的段. c. #include<iostream> #in…

水题,每当出现重复就分割开来,最后留下的尾巴给最后一段 #include<cstdio> #include<cstring> #include<cmath> #include<stack> #include<vector> #include<map> #include<string> #include<iostream> #include<algorithm> using namespace std…

C. Pearls in a Row There are n pearls in a row. Let's enumerate them with integers from 1 to n from the left to the right. The pearl number i has the type ai. Let's call a sequence of consecutive pearls a segment. Let's call a segment good if it cont…

time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output There are n pearls in a row. Let's enumerate them with integers from 1 to n from the left to the right. The pearl number i has the type ai. Let'…

CF620C Pearls in a Row 洛谷评测传送门 题目描述 There are nn pearls in a row. Let's enumerate them with integers from 11 to nn from the left to the right. The pearl number ii has the type a_{i}*a**i* . Let's call a sequence of consecutive pearls a segment. Let's…

C. Pearls in a Row time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There are n pearls in a row. Let's enumerate them with integers from 1 to n from the left to the right. The pearl number …

Educational Codeforces Round 6 C. Pearls in a Row 题意:一个3e5范围的序列:要你分成最多数量的子序列,其中子序列必须是只有两个数相同, 其余的数只能出现一次. 策略: 延伸:这里指的延伸如当发现1-1如果以最后出现重叠的数为右边界则就表示左延伸,若以1.0.1..0第二个0前一个位置作为右边界就为右延伸: 开始时想是右延伸,考虑到可能只出现一组两个数相同,认为向左延伸会出错,但是直接WA了之后,发现这并不是题目的坑点(其实只需将最后一组改成左右…

C. Pearls in a Row time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There are n pearls in a row. Let's enumerate them with integers from 1 to n from the left to the right. The pearl number …

C. Pearls in a Row time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There are n pearls in a row. Let's enumerate them with integers from 1 to n from the left to the right. The pearl number …