Ositus

input/code.cpp: In function 'uint64_t sana_maara(char*, int, int)':
input/code.cpp:26:28: warning: array subscript has type 'char' [-Wchar-subscripts]
         if(kirjaimet[kirjin] != 0) {
                            ^
input/code.cpp:30:25: warning: array subscript has type 'char' [-Wchar-subscripts]
         kirjaimet[kirjin] = 1;
                         ^

#include <iostream>
#include <cstring>
//#include <string>

using namespace std;

const uint64_t AAAA = 1000000007;
int64_t maarat[1000000] = {0};

uint64_t sana_maara(/*string*/char* t, int s, int len)
{
    if(maarat[s] != 0) {
        //cout << "CACHE " << s << " " << maarat[s] << endl;
        return maarat[s];
    }

    uint64_t maara = 0;
    char kirjaimet[26] = {0};
    int i;

    kirjaimet[t[s] - 'a'] = 1;
    for(i = s + 1; i < len; i++) {
        char kirjain = t[i];
        char kirjin = kirjain - 'a';
        maara += sana_maara(t, i, len);
        if(kirjaimet[kirjin] != 0) {
            break;
        }

        kirjaimet[kirjin] = 1;
    }

    if(i == len) {
        maara = 1 << (i - s - 1);
    }

    maara %= AAAA;
    maarat[s] = maara;
    return maara % AAAA;
}

int main()
{
    //string t;
    char *t = (char*) malloc(1000001);
    cin >> t;
    
    //cout << sana_maara(t, 0, t.length()) << endl;
    cout << sana_maara(t, 0, strlen(t)) << endl;
}

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

Test 5

Group: 2, 3

Verdict: ACCEPTED

Test 6

Group: 3

Verdict: ACCEPTED

Test 7

Group: 3

Verdict: ACCEPTED