Submission #4024133


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#include<bits/stdc++.h>

#define pb push_back
#define mp make_pair

#define fi first
#define se second

typedef long long ll;

using namespace std;
string s;
/*
bool check(int i, int j){
    string t = "";
    t += s.substr(0, i - 1);
    string k = "";
    k += s.substr(i, j - i + 1);
    reverse(k.begin(), k.end());
    t += k;
    t += s.substr(j + 1, s.size() - j + 2);
    if(s != t)return 1;
    return 0;
}
*/

ll cnt[27];

int main(){/*
ios::sync_with_stdio(0);
cin.tie(0), cout.tie(0);*/
/*
cin >> s;
int res = 0;
for(int i=0;i<s.size();i++){
    for(int j=i+1;j<s.size();j++){
        if(check(i, j))res++;
    }
}
cout << res;
*/

cin >> s;
for(int i=0;i<s.size();i++){
    cnt[s[i] - 'a']++;
}
int n = s.size();
int res = (n * 1ll * (n - 1)) / 2;
for(int i=0;i<26;i++){
    res -= (cnt[i] * 1ll * (cnt[i] - 1)) / 2;
}
cout << res + 1;
return 0;
}

Submission Info

Submission Time
Task B - Reverse and Compare
User saken03
Language C++14 (GCC 5.4.1)
Score 0
Code Size 915 Byte
Status
Exec Time 9 ms
Memory 640 KB

Judge Result

Set Name Score / Max Score Test Cases
Sample 0 / 0 sample_01.txt, sample_02.txt, sample_03.txt
All 0 / 500 sample_01.txt, sample_02.txt, sample_03.txt, sample_01.txt, sample_02.txt, sample_03.txt, subtask_1_01.txt, subtask_1_02.txt, subtask_1_03.txt, subtask_1_04.txt, subtask_1_05.txt, subtask_1_06.txt, subtask_1_07.txt, subtask_1_08.txt, subtask_1_09.txt, subtask_1_10.txt, subtask_1_11.txt, subtask_1_12.txt, subtask_1_13.txt, subtask_1_14.txt, subtask_1_15.txt, subtask_1_16.txt, subtask_1_17.txt
Case Name Status Exec Time Memory
sample_01.txt 1 ms 256 KB
sample_02.txt 1 ms 256 KB
sample_03.txt 1 ms 256 KB
subtask_1_01.txt 1 ms 256 KB
subtask_1_02.txt 8 ms 640 KB
subtask_1_03.txt 1 ms 256 KB
subtask_1_04.txt 1 ms 256 KB
subtask_1_05.txt 1 ms 256 KB
subtask_1_06.txt 1 ms 256 KB
subtask_1_07.txt 2 ms 256 KB
subtask_1_08.txt 8 ms 640 KB
subtask_1_09.txt 8 ms 640 KB
subtask_1_10.txt 9 ms 640 KB
subtask_1_11.txt 8 ms 640 KB
subtask_1_12.txt 8 ms 640 KB
subtask_1_13.txt 8 ms 640 KB
subtask_1_14.txt 8 ms 640 KB
subtask_1_15.txt 8 ms 640 KB
subtask_1_16.txt 8 ms 640 KB
subtask_1_17.txt 8 ms 640 KB