acwing1944.记录保存

acwing.1944记录保存

原题链接:https://www.acwing.com/problem/content/1946/

思路

将三头牛放到一个vector里，然后用哈希表来记录出现的次数

代码

#include<iostream>
#include<cstring>
#include<algorithm>
#include<map>
#include<vector>

using namespace std;

int main()
{
    int n;
    cin >> n;
    map<vector<string>,int> hash;
    for(int i = 0; i < n; i ++)
    {
        vector<string> cows(3);
        for(int i = 0; i < 3; i ++) cin >> cows[i];
        sort(cows.begin(),cows.end());
        
        hash[cows] ++;
    }
    
    int ans = 0;
    for(auto& [e,v] : hash)
    {
        ans = max(v,ans);
    }
    
    cout << ans;
    
    return 0;
}