zoukankan      html  css  js  c++  java
  • LeetCode_Text Justification

    Given an array of words and a length L, format the text such that each line has exactly L characters and is fully (left and right) justified.
    
    You should pack your words in a greedy approach; that is, pack as many words as you can in each line. Pad extra spaces ' ' when necessary so that each line has exactly L characters.
    
    Extra spaces between words should be distributed as evenly as possible. If the number of spaces on a line do not divide evenly between words, the empty slots on the left will be assigned more spaces than the slots on the right.
    
    For the last line of text, it should be left justified and no extra space is inserted between words.
    
    For example,
    words: ["This", "is", "an", "example", "of", "text", "justification."]
    L: 16.
    
    Return the formatted lines as:
    
    [
       "This    is    an",
       "example  of text",
       "justification.  "
    ]
    Note: Each word is guaranteed not to exceed L in length.
    

      分析: 主要注意两个地方。一, 正常的句子单词之间的空格数目是一;二,最后一行句子按正常处理

    class Solution {
    public:
        vector<string> fullJustify(vector<string> &words, int L) {
            // Start typing your C/C++ solution below
            // DO NOT write int main() function
            vector<string> res;
            if(words.size() < 1) return res;
            
            int start , end, len , evenSpace, bonus;
            
            end = 0;
            while(true){
            
                len = 0;
                for(start = end; end < words.size(); ++end){
                    if(len +(end - start) + words[end].length() > L) break;// normal sentence has one space between words
                    len += words[end].length();    
                }
                end--;
                
                if(end == start){ // only one word
                    string line = words[end];
                    line.append(L - len, ' ');
                    res.push_back(line);
                }else{ // multiply words
                    
                    evenSpace = (L - len)/(end - start);
                    bonus = L -len - evenSpace*(end - start);
                    bool isLastLine = (end == words.size() -1);
                    if(isLastLine){
                        evenSpace = 1;
                        bonus = 0;
                    }
                    
                    string line = words[start];
                    for(int i = start + 1; i <= end; ++i)
                    {
                        int space = evenSpace;
                        if(bonus > 0)
                        {
                            --bonus;
                            ++space;
                        }
                        line.append(space,' ');
                        line.append(words[i]);
                    }
                    
                    if(isLastLine){
                        line.append(L-len - (end - start), ' ');
                    }
                    
                    res.push_back(line);
                }
                
                end++;
                if(end == words.size()) break;
            }
            
            return res;        
        }
    };
  • 相关阅读:
    CPP流类库与输入输出
    STL学习之mismatch();
    谷歌浏览器现在点击任何文本都会出现光标
    jQuery删除元素remove和和empty的区别
    jQuery中的鼠标离开事件mouseout和mouseleave区别
    java类中的布尔(boolean&Boolean)类型字段要注意get方法和字段的命名
    Navicat_Premium_v15 激活
    navicat注册过期修改方法
    ClassNotFoundException找不到类异常的原因package 路径eclipse自动给我在路径前面加了一个java变成了java.com.XXX
    我保存一份博客园样式代码
  • 原文地址:https://www.cnblogs.com/graph/p/3290497.html
Copyright © 2011-2022 走看看