注意数据范围,你这样写肯定TLE
by bj12z_liuzhengyue @ 2024-03-25 22:19:56
```
#include<bits/stdc++.h>
using namespace std;
map<int,int> a;
int b[200005];
int main(){
int n,c;
long long jsq=0;
cin>>n>>c;
for(int i=1;i<=n;i++){
cin>>b[i];
a[b[i]]++;
}
for(int i=1;i<=n;i++){
jsq+=a[b[i]+c];
}
cout<<jsq<<endl;
return 0;
}
```
by bj12z_liuzhengyue @ 2024-03-25 22:20:48