CSES - Datatähti 2022 alku - Results
Submission details
Task:Ositus (Partitioning)
Sender:MojoLake
Submission time:2021-10-04 23:29:15
Language:C++11
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
#7ACCEPTED0.61 s3details

Code

#include <iostream>
#include <string>
#include <set>
#define mod 1000000007
#define ll long long

using namespace std;

ll int dp[1000100];
string str;

ll int find_ans(unsigned ll int ind){
    set<char> chars;
    ll int first_ind = ind;
    ll int ans = 0;
    if(ind == str.length() - 2){
        if(str[ind] == str[ind+1]){dp[ind] = 1; return 1;}
        else{dp[ind] = 2; return 2;}
    }
    if(ind > str.length() - 2)return 1;
    while(true){
        if(ind > str.length()-1 || chars.find(str[ind]) != chars.end())break;
        chars.insert(str[ind]);
        ++ind;
        if(ind > str.length()-1)ans += 1;
        else{
        if(dp[ind] == -1){
        ans = (ans + find_ans(ind)) %mod;}
        else{ans = (ans + dp[ind])%mod;}
    }}
    dp[first_ind] = ans %mod;
    ans = ans %mod;
    return ans;
}

int main()
{
    for(int i = 0; i < 1000100; ++i){
    dp[i] = -1;
}

    string x; getline(cin, x);
    if(x.length() == 1)cout << 1;
    else{
    dp[x.length()-1] = 1;
    str = x;
    cout << find_ans(0);}








    return 0;
}

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