Submission #1090345

#	Time	Username	Problem	Language	Result	Execution time	Memory
1090345		TrinhKhanhDung	Teams (CEOI11_tea)	C++14	0 / 100	228 ms	53324 KiB

tea

#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define sz(x) (int)x.size()
#define ALL(v) v.begin(),v.end()
#define MASK(k) (1LL << (k))
#define BIT(x, i) (((x) >> (i)) & 1)
#define oo (ll)1e18
#define INF (ll)1e9
#define MOD (ll)(1e9 + 7)

using namespace std;

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 T1, class T2>
    void add(T1 &a, T2 b){a += b; if(a >= MOD) a -= MOD;}

template<class T1, class T2>
    void sub(T1 &a, T2 b){a -= b; if(a < 0) a += MOD;}

template<class T>
    void cps(T &v){sort(ALL(v)); v.resize(unique(ALL(v)) - v.begin());}

const int MAX = 1e6 + 10;

int N;
pair<int, int> a[MAX];
vector<int> res[MAX];
int ans[MAX];

void solve(){
    cin >> N;
    for(int i = 1; i <= N; i++){
        cin >> a[i].fi;
        a[i].se = i;
    }
    sort(a + 1, a + N + 1);
    int cur = 0;
    int i = N, l = INF, r = N;
    while(i > 0){
        if(a[i].fi > i) break;
        cur++;
        minimize(l, a[i].fi);
        i -= a[i].fi;
    }

    auto OK = [&](int k) -> bool{
        for(int i = N; i >= 1; i -= k){
            if(a[i].fi > i || a[i].fi > k) return false;
        }
        return true;
    };

    l = (N - 1) / cur + 1, r = (N - 1) / (cur - 1);

    while(l < r){
        int m = (l + r) >> 1;
        if(OK(m)){
            r = m;
        }
        else{
            l = m + 1;
        }
    }
    int d = 0;
    for(int i = N; i >= 1; i -= r){
        d++;
        for(int j = 0; j < r; j++) ans[a[i - j].se] = d;
    }
    for(int i = 1; i <= N % r; i++) ans[a[i].se] = cur;

    for(int i = 1; i <= N; i++) res[ans[i]].push_back(i);
    cout << cur << '\n';
    for(int i = 1; i <= cur; i++){
        cout << sz(res[i]) << ' ';
        for(int j: res[i]) cout << j << ' ';
        cout << '\n';
    }
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
//     freopen("capsomayman.inp","r",stdin);
//     freopen("capsomayman.out","w",stdout);

    int t = 1;
//    cin >> t;
    while(t--){
        solve();
    }

    return 0;
}

//5
//2
//1
//2
//2
//3

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10