1110 - Minimal Rotation.cpp

/*
Problem Name: Minimal Rotation
Problem Link: https://cses.fi/problemset/task/1110
Author: Sachin Srivastava (mrsac7)
*/
#include<bits/stdc++.h>
using namespace std;

template<typename... T>
#define error(args...) { string _s = #args; replace(_s.begin(), _s.end(), ',', ' '); stringstream _ss(_s); istream_iterator<string> _it(_ss); err(_it, args); }
void err(istream_iterator<string> it) {}
template<typename T, typename... Args>
void err(istream_iterator<string> it, T a, Args... args) {cerr << *it << "=" << a << ", "; err(++it, args...);}

#define int long long
#define F first
#define S second

const long long inf = 1LL<<62;
const int md = 1000000007;

void solve(){
    string s;
    cin>>s;
    s+=s;
    int n = s.size();
    int i = 0;
    int ans = 0;
    while (i < n/2) {
        ans = i;
        int k = i, j = i + 1;
        while (j < n && s[j] >= s[k]) {
            if (s[j] == s[k]) k++;
            if (s[j] > s[k] ) k = i;
            j++;
        }
        while(i <= k) i += j - k;
    }
    cout<<s.substr(ans,n/2);
}    
signed main(){
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    #ifdef LOCAL
    freopen("input.txt", "r" , stdin);
    freopen("output.txt", "w", stdout);
    #endif
    int t=1;
    //cin>>t;
    for (int i = 1; i <= t; i++) {
        solve();
        cout<<'\n';
    }
}