Submission #1116912

#	Time	Username	Problem	Language	Result	Execution time	Memory
1116912		tintingyn21	Nivelle (COCI20_nivelle)	C++17	110 / 110	174 ms	11252 KiB

nivelle

// author : daohuyenchi



#ifdef LOCAL
    #include "D:\C++ Submit\debug.h"
#else
    #define debug(...)
#endif



#include <bits/stdc++.h>

using namespace std;

#define ull unsigned long long
#define db double
#define i32 int32_t  
#define i64 int64_t 
#define ll long long
// 
#define fi first
#define se second


//                                      #define int long long    // consider carefully


//
#define pii pair<int, int>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define pil pair<int, ll> 
#define PAIR make_pair 
//                                      TIME IS LIMITED ...  
#define  rep(i, a, b) for (int i = (a), _b = (b); i <= _b; ++i)
#define repd(i, b, a) for (int i = (b), _a = (a); i >= _a; --i)
#define repv(v, H) for(auto &v: H)
//                                      REFLECT ON THE PAST ...
#define RESET(c, x) memset(c, x, sizeof(c))
#define MASK(i) (1LL << (i))
#define BIT(mask, i) (((mask) >> (i)) & 1LL)
#define ONBIT(mask, i) ((mask) | (1LL << (i)))
#define OFFBIT(mask, i) ((mask) &~ (1LL << (i)))
#define COUNTBIT __builtin_popcountll
//                                      30 / 1 / 2024 ? love is zero... start from zero 
#define vi vector <int>
#define vll vector <ll>
#define lwb lower_bound
#define upb upper_bound
#define all(v) (v).begin(), (v).end()
#define special(H) (H).resize(distance(H.begin(), unique(all(H))))
//                                      
#define sp ' ' 
#define nl '\n'
#define EL {cerr << '\n';}
#define yes "YES"
#define no "NO"
#define Log2(n) (63 - __builtin_clzll(n))
#define left __left__
#define right __right__ 
#define lps(id) ((id) << 1)
#define rps(id) ((id) << 1 | 1)

//____________________________________________________________________


template <class X, class Y> bool maximize(X &a, const Y &b) {
    if(a < b) return a = b, true;
    return false;
}

template <class X, class Y> bool minimize(X &a, const Y &b) {
    if(a > b) return a = b, true;
    return false;
}

template <class... T>
void print(T&&... n) {
    using exp = int[];
    exp{0, (cerr << n << sp, 0)...};
    cerr << nl;
}

template <class T, class... C>
void assign(int n, T v, C&&... a) {
    using e = int[];
    e{(a.assign(n, v), 0)...};
}

template <class... C>
void resize(int n, C&&... a) {
    using e = int[];
    e{(a.resize(n), 0)...};
}

template <class T>
using vector2d = vector<vector<T>>;
template <class T>
using vector3d = vector<vector2d<T>>;

template <class T> int ssize(T &a) { return (int) a.size(); }


//____________________________________________________________________


mt19937 rng(chrono::steady_clock().now().time_since_epoch().count());

const int MOD      = 1000000007;
// const int MOD[2] = {1000000009, 998244353};

template<class X> void modmize(X &x, int cur_Mod = MOD) {
    if(x >= cur_Mod) x -= cur_Mod;
    if(x < 0) x += cur_Mod;
}

const long long oo = 1e18 + 7;
const long long LINF = 1e18 + 7;
const int IINF      = 2e9;
const int nmax     = 2e5 + 10;
const int MAX      = 2e5;
const int base     = 311;
const db eps       = 1e-6;
const int block    = 500;
static const double PI = acos(-1.0);

//____________________________________________________________________


int n;
string s;
int rmq[nmax][22];

int get(int l, int r) {
    int k = Log2(r - l + 1);
    return rmq[l][k] | rmq[r - (1 << k) + 1][k];
}

void tintingyn() {

    cin >> n ;
    cin >> s;
    s = sp + s;

    rep (i, 1, n) {
        rmq[i][0] = MASK(s[i] - 'a');
    }
    rep (k, 1, 18) {
        for (int i = 1; i + (1 << k) - 1 <= n; ++i) {
            rmq[i][k] = rmq[i][k - 1] | rmq[i + (1 << (k - 1))][k - 1];
        }
    }

    pii ans = {IINF, 1};
    pii pos;

    auto cmp = [&] (pii A, pii B) {
        return (ll) A.fi * B.se <= (ll) B.fi * A.se;
    } ; 

    // debug(get(1, 5), get(1, 6), get(1, 7));

    rep (i, 1, n) {
        int tmp = 0;
        int p = i;
        while (p <= n) {
            tmp |= MASK(s[p] - 'a');
            int l = p, r = n;
            int res = -1;
            while (l <= r) {
                int mid = (l + r) / 2;
                if (get(i, mid) == tmp) {
                    res = mid;
                    l = mid + 1;
                }
                else r = mid - 1;
            }

            pii val = PAIR(COUNTBIT(tmp), res - i + 1);

            // debug(i, p, res, tmp);

            if (cmp(val, ans)) {
                pos = {i, res};
                ans = val;
            }

            p = res + 1;
        }
    }

    cout << pos.fi << sp << pos.se << nl;


}

signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    //________________________________________________________________

    #define TASK "3"
    if(fopen(TASK".inp", "r")) {
        freopen(TASK".inp", "r", stdin);
        freopen(TASK".out", "w", stdout);
    }

    //________________________________________________________________
    
    //  CODE FROM HERE ...! 





    int num_test = 1; 
    // cin >> num_test;

    while(num_test--) {

        tintingyn();

    }


    cerr << '\n' << "Time elapsed: " << (1.0 * clock() / CLOCKS_PER_SEC) << " s\n" << nl;

    return 0;
}

Compilation message (stderr)

nivelle.cpp: In function 'int main()':
nivelle.cpp:210:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  210 |         freopen(TASK".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
nivelle.cpp:211:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  211 |         freopen(TASK".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 17 / 17
• Subtask 3: 13 / 13
• Subtask 4: 25 / 25
• Subtask 5: 48 / 48