string convert(string s, int numRows) { vector<vector<char>> a(numRows); // vector of vector to store character in each rows int i = 0; // variable to determine in which row we must add particular character bool direction = true; // variable to determine the direction of movement for (char ch : s) { a[i].push_back(ch); if (direction == true) // if direction is down => increment i i++; if (i == numRows) // if i reached end => reverse the direction and decrement i { direction = false; i--; } if (direction == false) // if direction is up => decrement i i--; if (i <= 0) // if i reached start => reverse the direction and set i to 0 { direction = true; i = 0; } } string str = ""; // forming the final string to return for (vector<char> c : a) { for (char ch : c) str += ch; } return str; } int main() // driver function { string str = "PAYPALISHIRING"; string ans = convert(str,3); cout << ans; return0;.

The code you provided implements the ZigZag Conversion algorithms for a given input string. The…

Answered: or> a(numRows); // vector of vector to…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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string convert(string s, int numRows)
	{
	vector<vector<char>> a(numRows); // vector of vector to store character in each rows
	int i = 0; // variable to determine in which row we must add particular character
	bool direction = true; // variable to determine the direction of movement
	for (char ch : s)
	{
	a[i].push_back(ch);
	if (direction == true) // if direction is down => increment i
	i++;
	if (i == numRows) // if i reached end => reverse the direction and decrement i
	{
	direction = false;
	i--;
	}
	if (direction == false) // if direction is up => decrement i
	i--;
	if (i <= 0) // if i reached start => reverse the direction and set i to 0
	{
	direction = true;
	i = 0;
	}
	}

	string str = ""; // forming the final string to return
	for (vector<char> c : a)
	{
	for (char ch : c)
	str += ch;
	}
	return str;
	}

	int main() // driver function
	{
	string str = "PAYPALISHIRING";
	string ans = convert(str,3);
	cout << ans;
	return0;.

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