Submission #1120982

#	Time	Username	Problem	Language	Result	Execution time	Memory
1120982		steveonalex	Nivelle (COCI20_nivelle)	C++17	110 / 110	26 ms	808 KiB

nivelle

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;

#define MASK(i) (1LL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()

ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}

ll gcd(ll a, ll b){return __gcd(a, b);}
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ll mask){return __builtin_popcountll(mask);}
int ctz(ll mask){return __builtin_ctzll(mask);}
int logOf(ll mask){return __lg(mask);}

mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}

template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }

template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }

template <class T>
    void printArr(T& container, char separator = ' ', char finish = '\n'){
        for(auto item: container) cout << item << separator;
        cout << finish;
    }


template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

void solve(){
    int n; cin >> n;
    string s; cin >> s;

    pair<ll, ll> ans = {1e9, 1}, range = {0, 0};
    for(int d = 1; d <= 26; ++d){
        int freg[26]; memset(freg, 0, sizeof freg);
        int j = 0;
        int cnt = 0;
        for(int i = 0; i<n; ++i){
            if (freg[s[i]-'a'] == 0) cnt++;
            freg[s[i]-'a']++;

            while(cnt > d){
                freg[s[j] - 'a']--;
                if (freg[s[j] - 'a'] == 0) cnt--;
                j++;
            }
            pair<ll, ll> cur = {cnt, i - j + 1};
            // cout << j << " " << i << " " << cur.first << " " << cur.second << "\n";
            if (ans.first * cur.second > ans.second * cur.first) {
                ans = cur;
                range = {j, i};
            }
        }
        if (cnt < d) break;
    }
    cout << range.first + 1 << " " << range.second + 1 << "\n";
}

int main(void){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    clock_t start = clock();
    
    solve();

    cerr << "Time elapsed: " << clock() - start << "ms!\n";
    return 0;
}

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