Rotations

input/code.cpp: In function 'bool better(std::__cxx11::string, int, int)':
input/code.cpp:29:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while(k < s.size() && s[(i + k) % s.size()] == s[(j + k) % s.size()]) k++;
           ~~^~~~~~~~~~
input/code.cpp: In function 'int main()':
input/code.cpp:61:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i = 1; i < s.size(); i++)
                        ~~^~~~~~~~~~
input/code.cpp:71:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 1; i < s.size(); i++) {
                    ~~^~~~~~~~~~

#include <vector>
#include <iostream>
#include <string>


using namespace std;

uint64_t sum(int *d) {
    uint64_t s = 0;
    uint64_t t = 1;
    for(int i = 12; i >= 0; i--)  {
        s += d[i] * t;
        t *= 26;
    }
    return s;
}

void print(string s, int a) {
    int n = s.size();
    for(int i = a; i < n; i++)
        cout << s[i];
    for(int i = 0; i < a; i++)
        cout << s[i];
    cout << endl;
}

bool better(string s, int i, int j) {
    int k = 0;
    while(k < s.size() && s[(i + k) % s.size()] == s[(j + k) % s.size()]) k++; 
    return s[i] < s[j];
}

uint64_t gen(uint64_t *a, string s) {
    uint64_t min = 1 << 30;
    int n = s.size();
    int d[13];

    for(int i = 0; i < 13; i++)
        d[i] = s[i];

    for(int i = 0; i < n; i++) {
        uint64_t m = sum(d);

        a[i] = m;

        if(m < min) min = m;
        d[i % 13] = s[(i + 13) % n];
    }

    return min;
}


int main() {
    string s;
    cin >> s;
    int n = s.size();

    if (n < 100) {
        int b = 0;
        for(int i = 1; i < s.size(); i++)
            if(better(s, i, b)) b = i;
        print(s, b);
        return 0;
    }

    uint64_t *hs = new uint64_t[s.size()];
    uint64_t m = gen(hs, s);

    int b = 0;
    for(int i = 1; i < s.size(); i++) {
        if(hs[i] != m) continue;
        if(better(s, i, b)) b = i;
    }
    print(s, b);
    return 0;

    return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: WRONG ANSWER

Test 3

Verdict: WRONG ANSWER

Test 4

Verdict: WRONG ANSWER

Test 5

Verdict: WRONG ANSWER

Test 6

Verdict: ACCEPTED

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: WRONG ANSWER