五污染物编号

哎哎哎:# t0]https://www . geeksforgeeks . org/pentcontenhanagon-number/

五角星数是一类图形数。它有一个 51 边的多边形，叫做五角星。第 N 个 Pentacontahenagon 数字计数是 51 个点的数量，所有其他点被一个共同的共享角包围并形成一个图案。 前几个五苯乙醇数字是:

1，51，150，298，…

寻找第 n 个五角星号的程序

给定一个数字 N ，任务是找到 N 第T5【号】。 举例:****

输入: N = 2 输出: 51 说明: 第二个五苯并呋喃酚编号为 51。 输入: N = 3 输出: 150

方法:第 N 个五角星数由公式给出:

  • S 边多边形的第 n 项= \frac{((S - 2)N^{2} - (S - 4)N)}{2}

  • 因此 51 边多边形的第 N 项由 给出

Tn =\frac{((51 - 2)N^{2} - (51 - 4)N)}{2} =\frac{(49N^{2} - 47N)}{2}

下面是上述方法的实现:

C++

// C++ program for the above approach
#include <bits/stdc++.h>
using namespace std;

// Function to find the N-th
// Pentacontahenagon Number
int PentacontahenagonNum(int N)
{
    return (49 * N * N - 47 * N)
        / 2;
}

// Driver Code
int main()
{
    int N = 3;

// Function Call
    cout << "3rd Pentacontahenagon Number is "
        << PentacontahenagonNum(N);

    return 0;
}

Java 语言(一种计算机语言，尤用于创建网站)

// Java program for the above approach
import java.util.*;
class GFG{

// Function to find the N-th
// Pentacontahenagon Number
static int PentacontahenagonNum(int N)
{
    return (49 * N * N - 47 * N) / 2;
}

// Driver Code
public static void main(String[] args)
{
    int N = 3;

    // Function Call
    System.out.print("3rd Pentacontahenagon Number is " +
                                PentacontahenagonNum(N));
}
}

// This code is contributed by Rajput-Ji

Python 3

# Python3 program for the above approach

# Function to find the N-th
# Pentacontahenagon Number
def PentacontahenagonNum(N):

    return (49 * N * N - 47 * N) // 2;

# Driver Code
N = 3;

# Function Call
print("3rd Pentacontahenagon Number is",
               PentacontahenagonNum(N));

# This code is contributed by Code_Mech

C

// C# program for the above approach
using System;
class GFG{

// Function to find the N-th
// Pentacontahenagon Number
static int PentacontahenagonNum(int N)
{
    return (49 * N * N - 47 * N) / 2;
}

// Driver Code
public static void Main()
{
    int N = 3;

    // Function Call
    Console.Write("3rd Pentacontahenagon Number is " +
                             PentacontahenagonNum(N));
}
}

// This code is contributed by Code_Mech

java 描述语言

<script>
// Javascript program for the above approach

    // Function to find the N-th
    // Pentacontahenagon Number
    function PentacontahenagonNum( N) {
        return (49 * N * N - 47 * N) / 2;
    }

    // Driver Code

        let N = 3;

        // Function Call
        document.write("3rd Pentacontahenagon Number is " + PentacontahenagonNum(N));

// This code is contributed by aashish1995
</script>

Output: 

3rd Pentacontahenagon Number is 150

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