Ositus

input/code.cpp: In function 'int calc(std::__cxx11::string)':
input/code.cpp:11:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < line.length(); ++i) {
                     ~~^~~~~~~~~~~~~~~
input/code.cpp:22:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^

#include <bits/stdc++.h>

using namespace std;
#define ull unsigned long long

ull ans = 0;

int calc(string line){
    short fnd[25] = {0};
    bool brk = false;
    for (int i = 0; i < line.length(); ++i) {
        fnd[line[i]-97]++;
        if(fnd[line[i]-97] > 1) {
            brk = true;
            break;
        }
        calc(line.substr(i+1, line.length()-i));
    }
    if(!brk){
        ans++;
    }
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    std::string line;
    std::getline(std::cin, line);

    calc(line);

    cout << ans/2;
    flush(std::cout);
}

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: TIME LIMIT EXCEEDED

Test 6

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 7

Group: 3

Verdict: RUNTIME ERROR