Ositus

input/code.cpp: In function 'partition calculateMaxPartition(std::__cxx11::string, long long int)':
input/code.cpp:16:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (long long a = start; a < i.size() && !end; a++)
                            ~~^~~~~~~~~~
input/code.cpp:18:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (long long b = 0; b < seen.size() && !end; b++)if (i[a] == seen[b])end = true;
                         ~~^~~~~~~~~~~~~
input/code.cpp: In function 'void partitions(std::__cxx11::string, long long int)':
input/code.cpp:32:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (a == input.size() - 1)maxi++;
       ~~^~~~~~~~~~~~~~~~~~~

#include <iostream>
#include <string>
#include <vector>
using namespace std;

struct partition
{
	long long start, end;
};
partition calculateMaxPartition(string i, long long start)
{
	partition o;
	o.start = start;
	vector<char>seen;
	bool end = false;
	for (long long a = start; a < i.size() && !end; a++)
	{
		for (long long b = 0; b < seen.size() && !end; b++)if (i[a] == seen[b])end = true;
		if (end)o.end = a - 1;
		else seen.push_back(i[a]);
	}
	if (!end)o.end = i.size() - 1;
	return o;
}

long long maxi = 0;
void partitions(string input, long long start)
{
	partition p = calculateMaxPartition(input, start);
	for (long long a = p.start; a <= p.end; a++)
	{
		if (a == input.size() - 1)maxi++;
		else partitions(input, a + 1);
	}
}
int main()
{
	string input;
	cin >> input;

	long long modulo = 10;
	for (long long i = 0; i < 9; i++)
	{
		modulo *= 10;
	}
	modulo += 7;

	partitions(input, 0);
	cout << maxi % modulo;
}

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