Accepted
Code
#include<bits/stdc++.h>
using namespace std;
const long long M=2e5+10,MOD=1000000007;
typedef long long ll;
int main()
{
ios::sync_with_stdio(false);
cin.tie(0);
int t;
cin>>t;
while(t--){
int n;
string s;
cin>>n>>s;
ll ans=0;
vector<ll>fre(27,0);
for(int i=0;i<n;i++){
ans+=fre[s[i]-'a'];
fre[s[i]-'a']++;
}
ans*=2;
cout<<ans<<"\n";
}
return 0;
}
Information
- Submit By
- Type
- Submission
- Problem
- P1038 Do not touch my string
- Language
- C++20 (G++ 13.2.0)
- Submit At
- 2024-05-02 18:21:55
- Judged At
- 2024-05-02 18:21:55
- Judged By
- Score
- 100
- Total Time
- 6ms
- Peak Memory
- 1.43 MiB