把代码发出来谢谢
by Meteorium @ 2023-09-19 21:45:28
做法假了
by ruruo @ 2023-09-19 21:46:39
A和B不一定相邻。
by howie09 @ 2023-09-19 21:47:02
```cpp
#include<bits/stdc++.h>
using namespace std;
int main() {
map<int, int> m;
long long n, c, a[200005], ans = 0;
cin >> n >> c;
for(int i = 1; i <= n; i++){
cin >> a[i];
m[a[i]]++;
}
for(int i = 1; i <= n; i++){
ans += m[a[i] + c];
}
cout << ans << endl;
return 0;
}
```
by ruruo @ 2023-09-19 21:47:03
@[howie09](/user/625847) ???RE
[https://www.luogu.com.cn/record/125248435](https://www.luogu.com.cn/record/125248435)
by learn_code_guan @ 2023-09-19 21:49:54
@[learn_code_guan](/user/938629) 数组开小了
by _O_v_O_ @ 2023-09-19 21:50:56
@[learn_code_guan](/user/938629) RE就是数组开小了
by Meteorium @ 2023-09-19 21:53:10
And then TLE……
https://www.luogu.com.cn/record/125249388
by learn_code_guan @ 2023-09-19 21:54:26
@[_O_v_O_](/user/782941) @[F12aaaaaaa](/user/920043)
by learn_code_guan @ 2023-09-19 21:54:56
@[learn_code_guan](/user/938629) 你的复杂度太高，暴力过不了
by howie09 @ 2023-09-19 21:55:10