k-mer

#include <iostream>
#include <cassert>
#include <map>
#include <tuple>
#include <bitset>

using namespace std;

int main() {
  cin.sync_with_stdio(false);

  string s;
  cin >> s;

  int mer = 0, atat = 0, gcgc = 0;
  for (char c: s) {
    int base = (c == 'A' ? 1
		: c == 'T' ? 2
		: c == 'G' ? 3
		: c == 'C' ? 4
		: 0);
    mer = ((mer << 3) + base) & 07777;
    atat += (mer == 01212);
    gcgc += (mer == 03434);
  }

  cout << ( atat > gcgc ? "Kaaleppi"
	    : atat < gcgc ? "Maija"
	    : "not sure" ) << "\n"; 
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED

Test 18

Verdict: ACCEPTED

Test 19

Verdict: ACCEPTED

Test 20

Verdict: ACCEPTED

Test 21

Verdict: ACCEPTED

Test 22

Verdict: ACCEPTED

Test 23

Verdict: ACCEPTED

Test 24

Verdict: ACCEPTED

Test 25

Verdict: ACCEPTED

Test 26

Verdict: ACCEPTED

Test 27

Verdict: ACCEPTED

Test 28

Verdict: ACCEPTED

Test 29

Verdict: ACCEPTED

Test 30

Verdict: ACCEPTED