@[JMCJimmyMaker](/user/775490)
您对结构体进行了排序，但它不知道怎么排序。
所以请您写重载运算符或 `cmp`。
by tbdsh @ 2023-02-12 12:50:50
```cpp
sort(a + 1, a + n + 1);
```
给结构体排序的时候没有cmp或重载运算符怎么行呢？
by SovLite @ 2023-02-12 12:55:56
@[JMCJimmyMaker](/user/775490) 写cmp函数或者在结构体里写重载运算符
by 50lty12 @ 2023-02-12 13:46:07
# 最后一个测试点有同年同月同日的
# [博客主页](https://www.ricemoon.cn/)
```cpp
#include <bits/stdc++.h>
using namespace std;
#define LL long long
#define endl "\n"
const int N = 1e5 + 10;
const int M = 110;
int n;
vector<string> s;
int year[N], month[N], day[N];
int cnt = 0;
bool cmp(int x, int y)
{
if (year[x] != year[y]) return year[x] < year[y];
else
{
if (month[x] != month[y]) return month[x] < month[y];
else
{
if (day[x] != day[y]) return day[x] < day[y];
else return x > y;
}
}
}
void solve()
{
cin >> n;
int a[N];
for (int i = 0; i < n; i ++ )
{
string s2;
cin >> s2;
s.push_back(s2);
cin >> year[cnt] >> month[cnt] >> day[cnt];
++ cnt;
}
for (int i = 0; i < n; i ++ ) a[i] = i;
sort(a, a + n, cmp);
for (int i = 0; i < n; i ++ )
{
cout << s[a[i]] << endl;
}
}
int main()
{
ios::sync_with_stdio(false);
cin.tie(0);
solve();
return 0;
}
```
by Roger_Spencer @ 2023-02-19 16:05:12
好的，谢谢，此帖结
by JMCJimmyMaker @ 2023-07-15 11:19:07