CCF adjacent number pairs (Full Score code + problem solving ideas + skill summary) 201409-1

Title Description

Their thinking

• All numbers given in the title are different , So you can sort the numbers first , Then judge whether there is a difference between two adjacent numbers

Code implementation

#include <iostream>
#include <algorithm>
#include <cstring>

using namespace std;

const int N = 1010;

int n;
int a[N];

int main()
{
    
    cin >> n;
    
    for (int i = 0; i < n; i ++)
    {
    
        cin >> a[i];
    }
    
    sort(a, a + n); // Yes a Array to sort 
    
    int res = 0;
    
    for (int i = 1; i < n; i ++)
    {
    
        if(a[i] - a[i - 1] == 1) res ++;
    }
    
    cout << res;
    return 0;
}

Skill summary

• carefully Read the topic information clearly , For example, each number given in the title is different
• Sort the array ,sort(a, a + n)