CCF_201409-1_相邻数对

水。

#include<iostream>
#include<cstdio>
#include<algorithm>
using namespace std;

int main()
{
    int n,a[];
    cin >> n;
    for(int i = ;i <= n;i++)   cin >> a[i];
    sort(a+,a+n+);
    int num = ;
    for(int i = ;i < n;i++)
    {
        if(a[i+]-a[i] == )    num++;
    }
    cout << num << endl;
    return ;
}