Submission #1540556
Source Code Expand
#include<bits/stdc++.h>
typedef long long ll;
typedef unsigned long long ull;
using namespace std;
#define pb push_back
int dy[]={0, 0, 1, -1, 1, 1, -1, -1};
int dx[]={1, -1, 0, 0, 1, -1, -1, 1};
#define FOR(i,a,b) for (int i=(a);i<(b);i++)
#define RFOR(i,a,b) for (int i=(b)-1;i>=(a);i--)
#define REP(i,n) for (int i=0;i<(n);i++)
#define RREP(i,n) for (int i=(n)-1;i>=0;i--)
#define mp make_pair
#define fi first
#define sc second
char s[300000];
ll cou[30];
ll com2(ll n){
if(n < 2)
return 0;
ll m = n - 1;
if(n % 2)
m /= 2;
else
n /= 2;
return n * m;
}
int main(){
cin >> s;
ll n = strlen(s);
REP(i,30){
cou[i] = 0;
}
REP(i,n){
cou[s[i] - 'a']++;
}
ll ans = 1 + com2(n);
REP(i,30)
ans -= com2(cou[i]);
cout << ans << endl;
return 0;
}
Submission Info
Submission Time |
|
Task |
B - Reverse and Compare |
User |
kyawakyawa |
Language |
C++14 (GCC 5.4.1) |
Score |
500 |
Code Size |
899 Byte |
Status |
AC |
Exec Time |
7 ms |
Memory |
384 KB |
Judge Result
Set Name |
Sample |
All |
Score / Max Score |
0 / 0 |
500 / 500 |
Status |
|
|
Set Name |
Test Cases |
Sample |
sample_01.txt, sample_02.txt, sample_03.txt |
All |
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 |
AC |
1 ms |
256 KB |
sample_02.txt |
AC |
1 ms |
256 KB |
sample_03.txt |
AC |
1 ms |
256 KB |
subtask_1_01.txt |
AC |
1 ms |
256 KB |
subtask_1_02.txt |
AC |
7 ms |
384 KB |
subtask_1_03.txt |
AC |
1 ms |
256 KB |
subtask_1_04.txt |
AC |
1 ms |
256 KB |
subtask_1_05.txt |
AC |
1 ms |
256 KB |
subtask_1_06.txt |
AC |
1 ms |
256 KB |
subtask_1_07.txt |
AC |
2 ms |
256 KB |
subtask_1_08.txt |
AC |
7 ms |
384 KB |
subtask_1_09.txt |
AC |
7 ms |
384 KB |
subtask_1_10.txt |
AC |
7 ms |
384 KB |
subtask_1_11.txt |
AC |
7 ms |
384 KB |
subtask_1_12.txt |
AC |
7 ms |
384 KB |
subtask_1_13.txt |
AC |
7 ms |
384 KB |
subtask_1_14.txt |
AC |
7 ms |
384 KB |
subtask_1_15.txt |
AC |
7 ms |
384 KB |
subtask_1_16.txt |
AC |
7 ms |
384 KB |
subtask_1_17.txt |
AC |
7 ms |
384 KB |