Submission #617065

#	Time	Username	Problem	Language	Result	Execution time	Memory
617065		dxz05	Diversity (CEOI21_diversity)	C++14	4 / 100	7087 ms	1828 KiB

diversity

//#pragma GCC optimize("Ofast,O2,O3,unroll-loops")
//#pragma GCC target("avx2")

#include <bits/stdc++.h>

using namespace std;

void debug_out() { cerr << endl; }

template<typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
    cerr << "[" << H << "]";
    debug_out(T...);
}

#ifdef dddxxz
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif

#define SZ(s) ((int)s.size())
#define all(x) (x).begin(), (x).end()
#define lla(x) (x).rbegin(), (x).rend()
#define bpc(x) __builtin_popcount(x)
#define bpcll(x) __builtin_popcountll(x)
#define MP make_pair

clock_t startTime;

double getCurrentTime() {
    return (double) (clock() - startTime) / CLOCKS_PER_SEC;
}

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

typedef long long ll;
const int MOD = 998244353;
const int INF = 1000000101;
const long long LLINF = 1223372000000000555;
const int N = 1e6 + 3e2;
const int M = 1555;

int diversity(vector<int> a){
    int n = (int)a.size();
    int res = 0;
    for (int i = 0; i < n; i++){
        set<int> s;
        for (int j = i; j < n; j++){
            s.insert(a[j]);
            res += (int)s.size();
        }
    }
    return res;
}

void solve(int TC) {
    int n, q;
    cin >> n >> q;

    vector<int> a(n);
    for (int i = 0; i < n; i++) cin >> a[i];

    int m = *max_element(all(a)) + 1;

    vector<int> cnt(m, 0);
    while (q--){
        int l, r;
        cin >> l >> r;
        --l, --r;

        for (int i = l; i <= r; i++) cnt[a[i]]++;

        set<pair<int, int>> s;
        for (int i = l; i <= r; i++){
            s.insert(MP(cnt[a[i]], a[i]));
        }

        deque<int> dq;
        int flag = 0;
        while (!s.empty()){
            int x = s.rbegin()->second;
            s.erase(*s.rbegin());
            if (flag) dq.push_back(x); else
                dq.push_front(x);
            flag ^= 1;
        }

        vector<int> b;
        for (int x : dq){
            while (cnt[x]--) b.push_back(x);
        }

//        for (int x : b) cout << x << ' ';

        cout << diversity(b) << endl;

    }

}

int main() {
    startTime = clock();
    ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);

#ifdef dddxxz
    freopen("input.txt", "rg", stdin);
    freopen("output.txt", "w", stdout);
#endif

    int TC = 1;
    //cin >> TC;

    for (int test = 1; test <= TC; test++) {
        //debug(test);
        //cout << "Case #" << test << ": ";
        solve(test);
    }

#ifdef dddxxz
    cerr << endl << "Time: " << int(getCurrentTime() * 1000) << " ms" << endl;
#endif

    return 0;
}

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