1324. Print Words Vertically

Description

Given a string s. Return all the words vertically in the same order in which they appear in s.
Words are returned as a list of strings, complete with spaces when is necessary. (Trailing spaces are not allowed).
Each word would be put on only one column and that in one column there will be only one word.

 

Example 1:

Input: s = "HOW ARE YOU"
Output: ["HAY","ORO","WEU"]
Explanation: Each word is printed vertically. 
 "HAY"
 "ORO"
 "WEU"

Example 2:

Input: s = "TO BE OR NOT TO BE"
Output: ["TBONTB","OEROOE","   T"]
Explanation: Trailing spaces is not allowed. 
"TBONTB"
"OEROOE"
"   T"

Example 3:

Input: s = "CONTEST IS COMING"
Output: ["CIC","OSO","N M","T I","E N","S G","T"]

 

Constraints:

  • 1 <= s.length <= 200
  • s contains only upper case English letters.
  • It's guaranteed that there is only one space between 2 words.

Solutions

Solution 1

Python Code
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class Solution:
    def printVertically(self, s: str) -> List[str]:
        words = s.split()
        n = max(len(w) for w in words)
        ans = []
        for j in range(n):
            t = [w[j] if j < len(w) else ' ' for w in words]
            while t[-1] == ' ':
                t.pop()
            ans.append(''.join(t))
        return ans

Java Code
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class Solution {
    public List<String> printVertically(String s) {
        String[] words = s.split(" ");
        int n = 0;
        for (var w : words) {
            n = Math.max(n, w.length());
        }
        List<String> ans = new ArrayList<>();
        for (int j = 0; j < n; ++j) {
            StringBuilder t = new StringBuilder();
            for (var w : words) {
                t.append(j < w.length() ? w.charAt(j) : ' ');
            }
            while (t.length() > 0 && t.charAt(t.length() - 1) == ' ') {
                t.deleteCharAt(t.length() - 1);
            }
            ans.add(t.toString());
        }
        return ans;
    }
}

C++ Code
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class Solution {
public:
    vector<string> printVertically(string s) {
        stringstream ss(s);
        vector<string> words;
        string word;
        int n = 0;
        while (ss >> word) {
            words.emplace_back(word);
            n = max(n, (int) word.size());
        }
        vector<string> ans;
        for (int j = 0; j < n; ++j) {
            string t;
            for (auto& w : words) {
                t += j < w.size() ? w[j] : ' ';
            }
            while (t.size() && t.back() == ' ') {
                t.pop_back();
            }
            ans.emplace_back(t);
        }
        return ans;
    }
};

Go Code
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func printVertically(s string) (ans []string) {
	words := strings.Split(s, " ")
	n := 0
	for _, w := range words {
		n = max(n, len(w))
	}
	for j := 0; j < n; j++ {
		t := []byte{}
		for _, w := range words {
			if j < len(w) {
				t = append(t, w[j])
			} else {
				t = append(t, ' ')
			}
		}
		for len(t) > 0 && t[len(t)-1] == ' ' {
			t = t[:len(t)-1]
		}
		ans = append(ans, string(t))
	}
	return
}