---
title: "奶牛体操"
created: 2025-11-28
tags:
  - 算法
---

# 奶牛体操

## 题目 [奶牛体操](https://www.acwing.com/problem/content/1461/)

![[image-e1525b76.png]]

## 思路分析

![[image-bf280668.png]]

## 代码实现

```cpp
#include<bits/stdc++.h>
using namespace std;
#define endl '\n'

unordered_map<string,int> cnt;
const int N = 30;
int a[N];

int main()
{
    ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
    int k,n;cin>>k>>n;
    for(int i=0;i<k;i++){
        for(int i=0;i<n;i++){
            cin>>a[i];
        }
        for(int i=0;i<n;i++){
            for(int j=i+1;j<n;j++){
                // cout<<a[i]<<" "<<a[j]<<endl;
                string key = to_string(a[i]) + " " + to_string(a[j]);
                cnt[key]++;
            }
        }
    }
    int ans=0;
    for(auto x:cnt){
        // cout<<x.first<<" "<<x.second<<endl;
        if(x.second==k)    ans++;
    }
    cout<<ans;
    return 0;
}
```

## 同类题型

## 视频讲解

---
⬅️ [[哞叫时间2|哞叫时间2]] 🏠 [[00-刷题理模型]] ➡️ [[奶牛体检|奶牛体检]]