Submission #617493

#	Time	Username	Problem	Language	Result	Execution time	Memory
617493		drdilyor	Diversity (CEOI21_diversity)	C++17	0 / 100	7033 ms	2120 KiB

diversity

#include <bits/stdc++.h>
#ifdef ONPC
#define cerr cout
    #include "t_debug.cpp"
#else
    #define debug(...) 42
#endif
#define sz(a) ((int)(a).size())
using namespace std;
using ll = long long;
const int INF = 1e9;
const ll INFL = 1e18;
const int RANDOM = chrono::high_resolution_clock::now().time_since_epoch().count();
mt19937 rng(RANDOM);
template<typename T, typename U> istream& operator>>(istream& is, pair<T, U>& p) { return is >> p.first >> p.second; }
const int N = 3e5, LOGN = 17, MOD = 1e9+7;

ll brute(vector<int> arr) {
    int n = sz(arr);
    ll res = 0;
    do {
        ll cur = 0;
        for (int i = 0; i < n; i++) {
            for (int j = i; j < n; j++) {
                set<int>values;
                for (int k = i; k <= j; k++) {
                    values.insert(arr[k]);
                }
                cur += sz(values);
            }
        }
        if (cur < res) {
            res = cur;
            debug(cur, arr);
        }
    } while (next_permutation(arr.begin(), arr.end()));
    return res;
}
int solve() {
    int n, q;
    if (!(cin >> n >> q)) {
        return 1;
    }
    vector<int> arr(n);
    for (auto& i : arr) {cin >> i;}

    vector<int> count(N+1);
    for (int i : arr) count[i]++;

    auto comp = [&](int i, int j) {return count[i] < count[j];};
    multiset<int, decltype(comp)> srr(arr.begin(), arr.end(), comp);

    vector<int> pref, suff;
    int last = 0;
    for (int i = 0; i < n; i++) {
        int cur = *srr.begin();
        auto& arr = last ? suff : pref;
        while (!srr.empty() && *srr.begin() == cur) {
            arr.push_back(*srr.begin());
            srr.erase(srr.begin());
        }
        last ^= 1;
    }
    while (!suff.empty()) {
        pref.push_back(suff.back());
        suff.pop_back();
    }

    ll res = 0;

    for (int i = 0; i < n;i++) {
        for (int j= i; j < n; j++) {
            set<int> values;
            for (int k = i; k <= j; k++) {
                values.insert(pref[k]);
            }
            res += sz(values);
        }
    }
    cout << res << '\n';
    
    return 0;
}

signed main() {
    cin.tie(0)->sync_with_stdio(0);
    int t = 1;
    #ifdef ONPC
    t = 10000;
    #endif
    while (t-- && cin) {
        if (solve()) break;
        #ifdef ONPC
            cout << "____________________" << endl;
        #endif
    }
    return 0;
}

/*
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 ███▒▒███ ▒▒███▒▒███ ███▒▒███ ▒▒███  ▒███ ▒▒███ ▒███  ███▒▒███▒▒███▒▒███
▒███ ▒███  ▒███ ▒▒▒ ▒███ ▒███  ▒███  ▒███  ▒███ ▒███ ▒███ ▒███ ▒███ ▒▒▒ 
▒███ ▒███  ▒███     ▒███ ▒███  ▒███  ▒███  ▒███ ▒███ ▒███ ▒███ ▒███     
▒▒████████ █████    ▒▒████████ █████ █████ ▒▒███████ ▒▒██████  █████    
 ▒▒▒▒▒▒▒▒ ▒▒▒▒▒      ▒▒▒▒▒▒▒▒ ▒▒▒▒▒ ▒▒▒▒▒   ▒▒▒▒▒███  ▒▒▒▒▒▒  ▒▒▒▒▒     
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*/

Compilation message (stderr)

diversity.cpp: In function 'll brute(std::vector<int>)':
diversity.cpp:6:24: warning: statement has no effect [-Wunused-value]
    6 |     #define debug(...) 42
      |                        ^~
diversity.cpp:34:13: note: in expansion of macro 'debug'
   34 |             debug(cur, arr);
      |             ^~~~~

• Subtask 1: 0 / 4
• Subtask 2: 0 / 10
• Subtask 3: 0 / 8
• Subtask 4: 0 / 16
• Subtask 5: 0 / 26
• Subtask 6: 0 / 36