Code
#include<bits/stdc++.h>
using namespace std;
int main()
{
int t;
cin>>t;
while(t--){
int n;
cin>>n;
int arr[n];
int cnt=0;
for(int i=1; i<=n; i++){
arr[i-1]=i;
}
unordered_map<int,int>m;
for(int i=0; i<n; i++){
int temp=n-arr[i];
if(m[temp]){
cnt+=m[temp];
}
m[arr[i]]++;
}
cout<<cnt<<endl;
}
}
Information
- Submit By
- Type
- Pretest
- Problem
- P1073 Pair Sum
- Language
- C++17 (G++ 13.2.0)
- Submit At
- 2024-08-16 17:01:53
- Judged At
- 2024-11-11 03:13:05
- Judged By
- Score
- 10
- Total Time
- 1ms
- Peak Memory
- 480.0 KiB