Count substring with equal number of 0s 1s and 2s
Here given code implementation process.
/*
Java Program
Count substring with equal number of 0s 1s and 2s
*/
import java.util.HashMap;
import javafx.util.Pair;
public class Substring
{
// Count substring of equal number of zeros,ones and twos
public void equalCounter(String text)
{
// Get the number of characters
int n = text.length();
int ans = 0;
// Define the counter variables
int zero = 0;
int one = 0;
int two = 0;
HashMap < Pair < Integer, Integer > , Integer > record =
new HashMap < Pair < Integer, Integer > , Integer > ();
// First pair
record.put(new Pair < Integer, Integer > (0, 0), 1);
// iterate the loop through by text length
for (int i = 0; i < n; i++)
{
if (text.charAt(i) == '0')
{
zero++;
}
else if (text.charAt(i) == '1')
{
one++;
}
else if (text.charAt(i) == '2')
{
two++;
}
else
{
System.out.print("Invalid char : " + text.charAt(i));
return;
}
// Create new pair
Pair < Integer, Integer > p = new Pair < Integer, Integer > (zero - one, zero - two);
if (record.containsKey(p))
{
// Get new result
ans = ans + record.get(p);
// increase pairing pairs
record.put(p, record.get(p) + 1);
}
else
{
// Add new pair
record.put(p, 1);
}
}
System.out.println(" Text : " + text);
System.out.println(" Result : " + ans);
}
public static void main(String[] arg)
{
Substring task = new Substring();
String text = "100102021021001102";
/*
// Single character
100102021021001102
102
100102021021001102
021
100102021021001102
210
100102021021001102
102
100102021021001102
021
100102021021001102
210
100102021021001102
102
// Double character
100102021021001102
102021
100102021021001102
021021
100102021021001102
210210
// Three character
100102021021001102
102021021
*/
task.equalCounter(text);
}
}Output
Text : 100102021021001102
Result : 11// Include header file
#include <iostream>
#include <utility>
#include <string>
#include <map>
using namespace std;
/*
C++ Program
Count substring with equal number of 0s 1s and 2s
*/
class Substring
{
public:
// Count substring of equal number of zeros,ones and twos
void equalCounter(string text)
{
// Get the number of characters
int n = text.length();
int ans = 0;
// Define the counter variables
int zero = 0;
int one = 0;
int two = 0;
map < pair < int, int > , int > record ;
// First pair
record[make_pair(0, 0)] = 1;
// iterate the loop through by text length
for (int i = 0; i < n; i++)
{
if (text[i] == '0')
{
zero++;
}
else if (text[i] == '1')
{
one++;
}
else if (text[i] == '2')
{
two++;
}
else
{
cout << "Invalid char : " << text[i];
return;
}
pair < int, int > p = make_pair(zero - one, zero - two);
if (record.find(p) != record.end())
{
// Get new result
ans = ans + record[p];
// increase pairing pairs
record[p] = record[p] + 1;
}
else
{
// Add new pair
record[p] = 1;
}
}
cout << " Text : " << text;
cout << "\n Result : " << ans;
}
};
int main()
{
Substring task = Substring();
string text = "100102021021001102";
/*
// Single character
100102021021001102
102
100102021021001102
021
100102021021001102
210
100102021021001102
102
100102021021001102
021
100102021021001102
210
100102021021001102
102
// Double character
100102021021001102
102021
100102021021001102
021021
100102021021001102
210210
// Three character
100102021021001102
102021021
*/
task.equalCounter(text);
return 0;
}Output
Text : 100102021021001102
Result : 11// Include namespace system
using System;
using System.Collections.Generic;
/*
C# Program
Count substring with equal number of 0s 1s and 2s
*/
public class Substring
{
// Count substring of equal number of zeros,ones and twos
public void equalCounter(String text)
{
// Get the number of characters
int n = text.Length;
int ans = 0;
// Define the counter variables
int zero = 0;
int one = 0;
int two = 0;
Dictionary < Tuple < int, int > , int > record =
new Dictionary < Tuple < int, int > , int > ();
// First pair
record.Add(Tuple.Create(0,0), 1);
// iterate the loop through by text length
for (int i = 0; i < n; i++)
{
if (text[i] == '0')
{
zero++;
}
else if (text[i] == '1')
{
one++;
}
else if (text[i] == '2')
{
two++;
}
else
{
Console.Write("Invalid char : " + text[i]);
return;
}
// Create new pair
Tuple <int,int> p = Tuple.Create(zero - one, zero - two);
if (record.ContainsKey(p))
{
// Get new result
ans = ans + record[p];
// increase pairing pairs
record[p] = record[p] + 1;
}
else
{
// Add new pair
record.Add(p, 1);
}
}
Console.WriteLine(" Text : " + text);
Console.WriteLine(" Result : " + ans);
}
public static void Main(String[] arg)
{
Substring task = new Substring();
String text = "100102021021001102";
/*
// Single character
100102021021001102
102
100102021021001102
021
100102021021001102
210
100102021021001102
102
100102021021001102
021
100102021021001102
210
100102021021001102
102
// Double character
100102021021001102
102021
100102021021001102
021021
100102021021001102
210210
// Three character
100102021021001102
102021021
*/
task.equalCounter(text);
}
}Output
Text : 100102021021001102
Result : 11# Python 3 Program
# Count substring with equal number of 0s 1s and 2s
class Substring :
# Count substring of equal number of zeros,ones and twos
def equalCounter(self, text) :
# Get the number of characters
n = len(text)
ans = 0
# Define the counter variables
zero = 0
one = 0
two = 0
record = dict()
# First pair
record[(0,0)] = 1
# iterate the loop through by text length
for i in range(n) :
if (text[i] == '0') :
zero += 1
elif(text[i] == '1') :
one += 1
elif(text[i] == '2') :
two += 1
else :
print("Invalid char : ", text[i], end = "")
return
# Create new pair
p = (zero - one, zero - two)
if (p in record.keys()) :
# Get new result
ans = ans + record.get(p)
# increase pairing pairs
record[p] = record.get(p) + 1
else :
# Add new pair
record[p] = 1
print(" Text : ", text)
print(" Result : ", ans)
def main() :
task = Substring()
text = "100102021021001102"
#
# // Single character
# 100102021021001102
# 102
# 100102021021001102
# 021
# 100102021021001102
# 210
# 100102021021001102
# 102
# 100102021021001102
# 021
# 100102021021001102
# 210
# 100102021021001102
# 102
# // Double character
# 100102021021001102
# 102021
# 100102021021001102
# 021021
# 100102021021001102
# 210210
# // Three character
# 100102021021001102
# 102021021
task.equalCounter(text)
if __name__ == "__main__": main()Output
Text : 100102021021001102
Result : 11
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