Submission #914418

#	Time	Username	Problem	Language	Result	Execution time	Memory
914418		vjudge1	Diversity (CEOI21_diversity)	C++17	4 / 100	7067 ms	6872 KiB

diversity

#include "bits/stdc++.h"
using namespace std;       

// #pragma comment(linker, "/stack:200000000")
// #pragma GCC optimize("Ofast")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")

using ll = long long;
using ld = long double;
#define pb push_back
#define ff first
#define ss second
#define sz(x) (ll)(x).size()
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()

void freopen(string s) { freopen((s+".in").c_str(), "r", stdin); freopen((s+".out").c_str(), "w", stdout); }
void IOIGold2024_InshAllah() { ios_base::sync_with_stdio(false); cin.tie(NULL); }
ll binmul(ll a, ll b, ll c) { ll res = 0; while(b) { if(b&1) (res += a) %= c; (a += a) %= c; b >>= 1; } return res; }
ll binpow(ll a, ll b, ll c) { ll res = 1; while(b) { if(b&1) (res *= a) %= c; (a *= a) %= c; b >>= 1; } return res; }
template<typename T> T gcd(T a, T b) { if(b==0) return a; return gcd(b, a%b); }
template<typename T> T lcm(T a, T b) { return a/gcd(a, b)*b; }
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ld rnd() { return rng()%INT_MAX*1.0/INT_MAX; }

const ll inf = 1e18+7, MX = LLONG_MAX, MN = LLONG_MIN;
const ll mod = 1e9+7, N = 3e5+5;
ll a[N], cnt[N], ans[N];

void kigash() {
    ll n, q;
    cin>>n>>q;
    vector<ll> v;
    for(ll i=1; i<=n; i++) {
        cin>>a[i];
        v.pb(a[i]);
        cnt[a[i]]++;
    }
    ll tmpl, tmpr;
    cin>>tmpl>>tmpr;
    sort(all(v));
    v.erase(unique(all(v)), v.end());
    vector<pair<ll, ll>> b;
    for(ll i=0; i<sz(v); i++) b.pb({cnt[v[i]], v[i]});
    sort(rall(b));
    ll l = (sz(b)+1)/2-1, r = (sz(b)+1)/2, t = 0;
    for(ll i=0; i<sz(b); i++) {
        if(!t) ans[l--] = b[i].ss;
        else ans[r++] = b[i].ss;
        t ^= 1;
    }
    vector<ll> x;
    for(ll i=0; i<sz(b); i++) {
        for(ll j=1; j<=cnt[ans[i]]; j++) {
            x.pb(ans[i]);
        }
    }
    ll ans = 0;
    for(ll i=0; i<sz(x); i++) {
        set<ll> st;
        for(ll j=i; j<sz(x); j++) {
            st.insert(x[j]);
            ans += sz(st);
        }
    }
    cout<<ans<<"\n";
    return;
}

signed main(/*Kigash Amir*/) {
    // freopen("");
    IOIGold2024_InshAllah();
    ll tt = 1;
    // cin>>tt;
    for(ll i=1; i<=tt; i++) {
        kigash();
    }
}

Compilation message (stderr)

diversity.cpp: In function 'void freopen(std::string)':
diversity.cpp:17:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 | void freopen(string s) { freopen((s+".in").c_str(), "r", stdin); freopen((s+".out").c_str(), "w", stdout); }
      |                          ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diversity.cpp:17:73: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 | void freopen(string s) { freopen((s+".in").c_str(), "r", stdin); freopen((s+".out").c_str(), "w", stdout); }
      |                                                                  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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