CSES - Datatähti 2022 alku - Results
Submission details
Task:Ositus (Partitioning)
Sender:intoo
Submission time:2021-10-04 15:28:17
Language:C++17
Status:READY
Result:100
Feedback
groupverdictscore
#1ACCEPTED40
#2ACCEPTED25
#3ACCEPTED35
Test results
testverdicttimegroup
#1ACCEPTED0.01 s1, 2, 3details
#2ACCEPTED0.01 s1, 2, 3details
#3ACCEPTED0.01 s1, 2, 3details
#4ACCEPTED0.01 s1, 2, 3details
#5ACCEPTED0.01 s2, 3details
#6ACCEPTED0.01 s3details
#7ACCEPTED0.26 s3details

Compiler report

input/code.cpp: In function 'll f(int)':
input/code.cpp:18:34: warning: array subscript has type 'char' [-Wchar-subscripts]
  for (j = i; j >= 0 && !b[i][s[j]]; --j)
                                  ^
input/code.cpp:19:12: warning: array subscript has type 'char' [-Wchar-subscripts]
   b[i][s[j]] = 1;
            ^

Code

#include <iostream>

using namespace std;
using ll = long long;

constexpr ll M = 1e9+7;
string s;
int n;
ll t[1001001];
bool b[1001001][200];

ll f(int i)
{
	if (i < 0 || n <= i) return 1;
	if (i == 0) return 1;
	if (t[i]) return t[i];
	int j;
	for (j = i; j >= 0 && !b[i][s[j]]; --j)
		b[i][s[j]] = 1;
	ll p = 0;
	for (; j < i; ++j)
		p = (p + f(j)) % M;
	return t[i] = p;
}

int main()
{
	cin >> s;
	n = s.size();
	cout << f(n-1) << endl;
}

Test details

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

input
a

correct output
1

user output
1

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

input
abcdefghij

correct output
512

user output
512

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

input
abcabaacbc

correct output
120

user output
120

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

input
aaxxxxxxaa

correct output
4

user output
4

Test 5

Group: 2, 3

Verdict: ACCEPTED

input
mfyzvoxmppoxcvktmcjkryyocfweub...

correct output
643221148

user output
643221148

Test 6

Group: 3

Verdict: ACCEPTED

input
weinscqmmpgbrlboocvtbptgbahmwv...

correct output
831644159

user output
831644159

Test 7

Group: 3

Verdict: ACCEPTED

input
sxaoxcyrjoeieyinaqxwukgzdnhhsw...

correct output
816016015

user output
816016015