“Finden Sie ein Elementpaar aus einem Array, dessen Summe einer bestimmten Zahl Python entspricht” Code-Antworten

Zählen Sie Paare in einem Array, was zu einer bestimmten Summe führt

<script>
/* javascript implementation of simple method to find count of
pairs with given sum*/
    var arr = [ 1, 5, 7, -1, 5 ];
 
    // Returns number of pairs in arr[0..n-1] with sum equal
    // to 'sum'
    function getPairsCount(n , sum) {
        var hm = new Map();
 
        // Store counts of all elements in map hm
        for (var i = 0; i < n; i++) {
 
            // initializing value to 0, if key not found
            if (!hm.has(arr[i]))
                hm.set(arr[i], 0);
 
            hm.set(arr[i], hm.get(arr[i]) + 1);
        }
        var twice_count = 0;
 
        // iterate through each element and increment the
        // count (Notice that every pair is counted twice)
        for (i = 0; i < n; i++) {
            if (hm.get(sum - arr[i]) != null)
                twice_count += hm.get(sum - arr[i]);
 
            // if (arr[i], arr[i]) pair satisfies the
            // condition, then we need to ensure that the
            // count is decreased by one such that the
            // (arr[i], arr[i]) pair is not considered
            if (sum - arr[i] == arr[i])
                twice_count--;
        }
 
        // return the half of twice_count
        return twice_count / 2;
    }
 
    // Driver method to test the above function
        var sum = 6;
        document.write("Count of pairs is " + getPairsCount(arr.length, sum));
 
// This code is contributed by umadevi9616
</script>
Panicky Parrot

Zählen Sie Paare in einem Array, was zu einer bestimmten Summe führt

<script>
// javascript implementation of simple method to find count of
// pairs with given sum.
 
    // Returns number of pairs in arr[0..n-1] with sum equal
    // to 'sum'
    function getPairsCount(arr , n , k) {
        var m = new Map();
        var count = 0;
        for (var i = 0; i < n; i++) {
            if (m.has(k - arr[i])) {
                count += m.get(k - arr[i]);
            }
            if (m.has(arr[i])) {
                m.set(arr[i], m.get(arr[i]) + 1);
            } else {
                m.set(arr[i], 1);
            }
        }
        return count;
    }
 
    // Driver function to test the above function
        var arr = [ 1, 5, 7, -1, 5 ];
        var n = arr.length;
        var sum = 6;
        document.write("Count of pairs is " + getPairsCount(arr, n, sum));
 
// This code is contributed by umadevi9616
</script>
Panicky Parrot

Finden Sie ein Elementpaar aus einem Array, dessen Summe einer bestimmten Zahl Python entspricht

#Given an array of integers and a number, write a function that finds two elements from the array whose sum is equal to the given number.
def find_pair(arr, num):
  for i in range(len(arr)):
    for j in range(i + 1, len(arr)):
      if arr[i] + arr[j] == num:
        return [arr[i], arr[j]]

print(find_pair([3, 6, 8, -8, 10, 8], 16))
[6, 10]
Intempestive Al Dente

Ähnliche Antworten wie “Finden Sie ein Elementpaar aus einem Array, dessen Summe einer bestimmten Zahl Python entspricht”

Fragen ähnlich wie “Finden Sie ein Elementpaar aus einem Array, dessen Summe einer bestimmten Zahl Python entspricht”

Weitere verwandte Antworten zu “Finden Sie ein Elementpaar aus einem Array, dessen Summe einer bestimmten Zahl Python entspricht” auf Python

Durchsuchen Sie beliebte Code-Antworten nach Sprache

Durchsuchen Sie andere Codesprachen

Shell/Bash
C#
C++
C
CSS
HTML
Java
JavaScript
Objective-C
PHP
Python
Sql
Swift
Ruby
TypeScript
Go
Kotlin
Assembly
R
VBA
Scala
Rust
Dart
Elixir
Clojure
Haskell
Matlab
Erlang
Cobol
Fortran
Scheme
Perl
Groovy
Lua
Julia
Delphi
Abap
Lisp
Prolog
Pascal
ActionScript
Basic
Solidity
PowerShell
GDScript
Excel