Submission #380259

#	Time	Username	Problem	Language	Result	Execution time	Memory
380259		bibabas	Nivelle (COCI20_nivelle)	C++14	110 / 110	37 ms	640 KiB

nivelle

#ifdef LOCAL
#define _GLIBCXX_DEBUG
#endif
// #define _FORTIFY_SOURCE 0 
// #pragma GCC optimize("Ofast") 
// #pragma GCC optimize("no-stack-protector") 
// #pragma GCC optimize("unroll-loops") 
// //#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,tune=native") 
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx") 
// #pragma GCC optimize("inline") 
// #pragma GCC optimize("-fgcse") 
// #pragma GCC optimize("-fgcse-lm") 
// #pragma GCC optimize("-fipa-sra") 
// #pragma GCC optimize("-ftree-pre") 
// #pragma GCC optimize("-ftree-vrp") 
// #pragma GCC optimize("-fpeephole2") 
// #pragma GCC optimize("-ffast-math") 
// #pragma GCC optimize("-fsched-spec") 
// #pragma GCC optimize("unroll-loops") 
// #pragma GCC optimize("-falign-jumps") 
// #pragma GCC optimize("-falign-loops") 
// #pragma GCC optimize("-falign-labels") 
// #pragma GCC optimize("-fdevirtualize") 
// #pragma GCC optimize("-fcaller-saves") 
// #pragma GCC optimize("-fcrossjumping") 
// #pragma GCC optimize("-fthread-jumps") 
// #pragma GCC optimize("-funroll-loops") 
// #pragma GCC optimize("-fwhole-program") 
// #pragma GCC optimize("-freorder-blocks") 
// #pragma GCC optimize("-fschedule-insns") 
// #pragma GCC optimize("inline-functions") 
// #pragma GCC optimize("-ftree-tail-merge") 
// #pragma GCC optimize("-fschedule-insns2") 
// #pragma GCC optimize("-fstrict-aliasing") 
// #pragma GCC optimize("-fstrict-overflow") 
// #pragma GCC optimize("-falign-functions") 
// #pragma GCC optimize("-fcse-skip-blocks") 
// #pragma GCC optimize("-fcse-follow-jumps") 
// #pragma GCC optimize("-fsched-interblock") 
// #pragma GCC optimize("-fpartial-inlining") 
// #pragma GCC optimize("no-stack-protector") 
// #pragma GCC optimize("-freorder-functions") 
// #pragma GCC optimize("-findirect-inlining") 
// #pragma GCC optimize("-fhoist-adjacent-loads") 
// #pragma GCC optimize("-frerun-cse-after-loop") 
// #pragma GCC optimize("inline-small-functions") 
// #pragma GCC optimize("-finline-small-functions") 
// #pragma GCC optimize("-ftree-switch-conversion") 
// #pragma GCC optimize("-foptimize-sibling-calls") 
// #pragma GCC optimize("-fexpensive-optimizations") 
// #pragma GCC optimize("-funsafe-loop-optimizations") 
// #pragma GCC optimize("inline-functions-called-once") 
// #pragma GCC optimize("-fdelete-null-pointer-checks")
#include <bits/stdc++.h>

using namespace std;
         
#define ll long long
#define ull unsigned ll
#define vi vector<int>
#define vvi vector<vi>
#define all(x) x.begin(), x.end()
#define pb push_back
#define mp make_pair
#define ld long double
#define pii pair<ll, ll>
#define mt make_tuple
#define mn(a, b) a = min(a, b)
#define mx(a, b) a = max(a, b)
#define base complex<ld>
 
using namespace std;
const ll INF = (ll)2e9;
const ll inf = (ll)1e18;
const ld eps = (ld)1e-12;
const ll mod = (ll)1e9 + 7;
const ll p = 31;
const ll mod2 = (ll)1e9 + 7;
const ll MAXN = (ll)51;
const ll MAXC = (ll)1e6 + 11;
const ll MAXE = (ll)100;
const ll MAXLOG = (ll)19;
const ll asci = (ll)256;
const ll block = 31623;
const ld PI = acos(-1LL);
const ld e = 2.7182818284;
         
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
// typedef tree<
// pii,
// null_type,
// less<pii>,
// rb_tree_tag,
// tree_order_statistics_node_update>
// ordered_set;

ll int_rand() {
    if (RAND_MAX == (1LL << 15) - 1LL) {
        return (rand() << 15) + rand();
    }
    return rand();
}

ll ll_rand() {
    return ((ll)int_rand() << 30LL) + int_rand();
}

istream& operator >>(istream &in, pii &x) {
    cin >> x.first >> x.second;
    return in;
}
         
template <class T>
istream& operator >>(istream &in, vector<T> &arr){
    for (T &cnt : arr) {
        in >> cnt;
    }
    return in;
}

void solve() {
    int n; cin >> n;
    string s; cin >> s;
    int lb = 0, rb = 0, num = INF, denum = 1;
    for (int i = 1; i <= 26; ++i) {
        vi last(26, -1);
        int l = 0, r = 0, cnt = 0;
        while (r < n) {
            while (r < n && cnt + (last[s[r] - 'a'] < l) <= i) {
                if (last[s[r] - 'a'] < l) ++cnt;
                last[s[r] - 'a'] = r;
                ++r;
            }
            if (cnt * denum < num * (r - l)) {
                lb = l, rb = r;
                num = cnt;
                denum = r - l;
            }
            while (cnt == i) {
                if (last[s[l] - 'a'] == l) --cnt;
                ++l;
            }
        }
    }
    cout << lb + 1 << " " << rb << "\n";
}

signed main() {
    srand(time(0LL));
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#else
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr); 
#endif
    cout.precision(30);
    
    solve();

    return 0LL;
}

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